I have a UItableview with cells. Some cells have uilabels and some have uibuttons. The UIbuttons are created whenever the first character in an array is "^". However, the uibuttons repeat when i scroll down (appearing over the uilabel).. and then multiply over the uilabels when I scroll up. Any clues why?

My voluminous code is below:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    const NSInteger LABEL_TAG = 1001;
    UILabel *label;
    UIButton *linkButton;
    //NSString *linkString;

    static NSString *CellIdentifier;
    UITableViewCell *cell;

    CellIdentifier = @"TableCell";
    cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];


    if (cell == nil) 
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

            label = [[UILabel alloc] initWithFrame:CGRectZero];
            [cell.contentView addSubview:label];
            [label setLineBreakMode:UILineBreakModeWordWrap];
            [label setMinimumFontSize:FONT_SIZE];
            [label setNumberOfLines:0];
            //[label setBackgroundColor:[UIColor redColor]];

            [label setTag:LABEL_TAG];



            NSString *firstChar = [[paragraphs objectAtIndex:indexPath.row] substringToIndex:1];
            NSLog(@"firstChar %@", firstChar);
            NSLog(@"before comparison");

            if ([firstChar isEqualToString:@"^"])  
            {
                // not called
                NSLog(@"BUTTON");
                //[label setFont:[UIFont boldSystemFontOfSize:FONT_SIZE]]; 
                linkButton = [UIButton buttonWithType:UIButtonTypeCustom];

                linkButton.frame = CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, 280, 30);
                [cell.contentView addSubview:linkButton];
                NSString *myString = [paragraphs objectAtIndex:indexPath.row]; 
                NSArray *myArray = [myString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"*"]];

                NSString *noHash = [myArray objectAtIndex:1]; 

                [linkButton setBackgroundImage:[UIImage imageNamed:@"linkButton.png"] forState:UIControlStateNormal];
                linkButton.adjustsImageWhenHighlighted = YES;

                [linkButton setTitle:noHash forState:UIControlStateNormal];

                linkButton.titleLabel.font = [UIFont systemFontOfSize:FONT_SIZE];

                [linkButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

                [linkButton setTag:indexPath.row];
                [linkButton addTarget:self 
                               action:@selector(openSafari:) 
                     forControlEvents:UIControlEventTouchUpInside];


                 //size = [noAsterisks sizeWithFont:[UIFont boldSystemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
                 [label setBackgroundColor:[UIColor clearColor]];

                 [label setText:@""];


            }






            cell.selectionStyle = UITableViewCellSelectionStyleNone;

    } else {


        label = (UILabel *)[cell viewWithTag:LABEL_TAG];

        NSString *firstChar = [[paragraphs objectAtIndex:indexPath.row] substringToIndex:1];
        NSLog(@"firstChar %@", firstChar);
        NSLog(@"before comparison");

         if ([firstChar isEqualToString:@"^"]) 
         {
             NSLog(@"cell not nil, reusing linkButton");

             linkButton = (UIButton *)[cell viewWithTag:indexPath.row];

         }

    }


    if (!label) label = (UILabel*)[cell viewWithTag:LABEL_TAG];

    NSString *textString = [paragraphs objectAtIndex:indexPath.row];
    NSString *noAsterisks = [textString stringByReplacingOccurrencesOfString:@"*" withString:@""] ; 
    CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
    CGSize size;

    NSString *firstChar = [[paragraphs objectAtIndex:indexPath.row] substringToIndex:1];
    //NSLog(@"firstChar %@", firstChar);

    if ([firstChar isEqualToString:@"^"])  
    {

        NSLog(@"BUTTON2");
        if (!linkButton) linkButton = (UIButton*)[cell viewWithTag:indexPath.row];

        linkButton = [UIButton buttonWithType:UIButtonTypeCustom];

        linkButton.frame = CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, 280, 30);
        [cell.contentView addSubview:linkButton];
        NSString *myString = [paragraphs objectAtIndex:indexPath.row]; 
        NSArray *myArray = [myString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"*"]];

        NSString *noHash = [myArray objectAtIndex:1]; 

        [linkButton setBackgroundImage:[UIImage imageNamed:@"linkButton.png"] forState:UIControlStateNormal];
        linkButton.adjustsImageWhenHighlighted = YES;

        [linkButton setTitle:noHash forState:UIControlStateNormal];

        linkButton.titleLabel.font = [UIFont systemFontOfSize:FONT_SIZE];

        [linkButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

        [linkButton setTag:indexPath.row];
        [linkButton addTarget:self 
                       action:@selector(openSafari:) 
             forControlEvents:UIControlEventTouchUpInside];


        size = [noAsterisks sizeWithFont:[UIFont boldSystemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
        [label setBackgroundColor:[UIColor clearColor]];

        [label setText:@""];

    } else if ([firstChar isEqualToString:@"*"]) 
    {
        size = [noAsterisks sizeWithFont:[UIFont boldSystemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
        [label setFont:[UIFont boldSystemFontOfSize:FONT_SIZE]]; 
        [label setText:noAsterisks];
        NSLog(@"bold");


    } else {
        size = [noAsterisks sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
        [label setFont:[UIFont systemFontOfSize:FONT_SIZE]]; 
        [label setText:noAsterisks];


    }


    [label setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size.height, 20.0f))];








    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    cell.accessoryType = UITableViewCellAccessoryNone;


    return cell;
}