Upgraded from what version?
Pasted into the layout or into a container?
Here are two known issues you can investigate:
It can also be downloaded as a database file from: http://www.4shared.com/file/8orL8apk/FMP_Bugs.html
Upgraded from 10 to 11.
Pasted into a container. As I stated, records added since the upgrade.
Not a portal. Single table.