Layout plan missing information

[BB boy]

Katt, I created a "new" layout page (per Article number: 527). With each drawing "sheet" I numbered consecutively such as A1, A2, A3 etc. Saved each layout as a separate file. As I sent details to layout, the software requires the "new" layout sheet each time, which I would number and save to it's own file, under the main file I had created for all the plans etc. I only know Sheet/drawing #A2, A5 kept the drawing/sheet number assigned, the other's didn't. If I assigned A1 to a sheet, all the other sheets (except A2 and A5) became A1. None of which makes sense.