It seems to that you have worked on the master and not applied any master to the shown spread.
On the master only stationaries are allowed, on the pages only content. To see master items you must apply the master to the pages.
I don't think so, Willi. The screen shot shows Master A applied, and that master has content that shows on the other two spreads.
DesignR, what version of InDesign are you using, including the patch level? You might have run into a bug that causes page content to lose the geometric bounds.
@Willi Adelberger I checked the master page and spreads but settings were okay. I mean they are all seems applied.
@Peter Spier Im working on version 8. I also realized that objects coordinates have changed(became infinity).(You can see on screenshot). Objects have lost in project space, i couldn't bring them back.
Yep, that's the bug I was talking about.
I'm not sure if it will work, but try select all, then paste into a new page. There are other threads about this, too, but it's been months since it came up and I've forgotten if there was a real workaround.