You may have heard people suggesting that you should create multiple PopItUp accounts in order to get around restrictions with the number of items you can post to Facebook, etc. However, you'll most likely end up causing more issues for yourself by using multiple POP accounts with the same FB account, since our "Facebook jail safeguards" only work on a single POP account.
Bottom line: you should stick with one PopItUp account unless you really know what you're doing. If you're having Facebook posting issues you can refer to the articles in the Facebook section of the Knowledge Base. If you're still having troubles we're just an email/chat away!