I'm very new to this forum-posting-thingy so forgive me if I get it wrong.
We encountered a very similar issue recently where the windows (elevation view) were displaying correctly in the schedule but two of them disappeared when placed on a page layout. Their associated dims on the elevation view were still visible and so was all the other scheduling info.
We solved this by tracking down one of the renovation filters (set up to present an 'Option' to the Client) we had two identical windows with the same ID (We use the ID to number our windows). In each option the window was pinned to that filter and both filters were meant to be displaying in the schedule. We removed the 'double up' by deleting our 'Option version' which we no longer need.
Not sure if this helps with any of the issues listed above, but thanks for this thread as it helped me to find our solution.
AC25 | 4013 AUSFULL
AC25 | 11th Gen Intel Core i7, 2.50GHz, RAM 16.0 GB, x64