Form1

Form1 is bound to Table1. Table1 has an ID field.

Form2

Form2 is bound to Table2 joined to Table1 on Table2.Table1_ID=Table1.ID

Here is the SQL (generated by Access):

SELECT
  Table2.*,
  Table1.[FirstFieldINeed],
  Table1.[SecondFieldINeed],
  Table1.[ThirdFieldINeed]
FROM Table1 INNER JOIN Table2 ON Table1.ID = Table2.[Table1_ID];

Form2 is opened with this code in Form1:

DoCmd.RunCommand acCmdSaveRecord
DoCmd.OpenForm "Form2", , , , acFormAdd, , Me.[ID]
DoCmd.Close acForm, "Form1", acSaveYes

And when loaded runs:

Me.[Table1_ID] = Me.OpenArgs

When Form2 is loaded, fields bound to columns from Table1 show up correctly.

Form3

Form3 is bound to Table3 joined to Table2 on Table3.Table2_ID=Table2.ID

Here is the SQL (generated by Access):

SELECT
  Table3.*,
  Table2.[FirstFieldINeed],
  Table2.[SecondFieldINeed]
FROM Table2 INNER JOIN Table3 ON Table2.ID = Table3.[Table2_ID];

Form3 is opened with this code in Form2:

DoCmd.RunCommand acCmdSaveRecord
DoCmd.OpenForm "Form3", , , , acFormAdd, , Me.[ID]
DoCmd.Close acForm, "Form2", acSaveYes

And when loaded runs:

Me.[Table2_ID] = Me.OpenArgs

When Form3 is loaded, fields bound to columns from Table2 do not show up correctly.

WHY?

UPDATES

I tried making the join query into a separate query and using that as my record source, but it made no difference at all.

If I go to the query for Form3 and view it in datasheet view, I can see that the information that should be pulled into the form is there. It just isn't showing up on the form.