In a same block of IPv4 addresses, can there be same IPs with different submasks? For example, can I have this:

180.70.65.140/26
180.70.65.140/25
180.70.65.140/24

All the 3 addresses above have the same numbers but different subnet mask. Are all the 3 addresses distinct of their own? In other words, 180.70.65.140/25 belongs to User A, 180.70.65.140/25 belongs to User B and 180.70.65.140/24 belongs to User C?

After applying the submask, their network addresses look like this:

180.70.65.140/26 --> 180.70.65.128/26
180.70.65.140/25 --> 180.70.65.128/25
180.70.65.140/24 --> 180.70.65.0/24

If the addresses are recognised uniquely, how is it so? How would each of the these addresses being recognised to be unique?

I am thinking like once I have 180.70.65.140/26, I can't reuse the same numbers of 180.70.65.140 again but since classless is meant to increase the number of IP addresses, it would do much if I can't reuse.