Watch the episode where Chandler has a bath.

Notice, the bathtub is next to the wall that is the opposite wall from the door.

Next, watch the episode in the start of the 10th season (first or second episode).

Monica's hair gets stuck in the pole above the bath tub.

And guess what? the bathtub is next to the wall that is next to the door!!!

Unless they had quite big plumbing jobs there, it doesn't make sense!