Reply To: Different text box sizes on master pages

Here’s my 2 cents:
So you have created Master A with a primary text frame. Good!
Then you have created Master B… My guess is that you created B based on Master-A. (you can check it by opening “master-B page options”)
Now, instead of resizing the primary text frame, maybe you have created a new one. (possibly with a [paper] background, which would explain why your master-B looks fine).
Now, when you apply Master-B to a normal page, what does happen? Your text frame is locked and the primary isn’t, and is on top.
If I’m guessing correctly, just go back to Master B, delete the created text frame and resize the primary text frame.
Tell us if this solves your issue.
Vinny