Hi there, a couple questions:
1.) When was the onset of this issue? Has it been happening from the first moment you had the device? Did you purchase it from a third party, etc.?
2.) Are you on a BES? Or if purchased from a third-party, was the device on a BES before? You can tell if a policy is applied by looking under Security --> General Settings and see if there's an IT policy name populated.
3.) If neither of the above really apply, I'd say it's a third party app gumming up your works, even if it looks like it's gone, unless you "nuke" the handheld (different than a wipe... it actually completely "formats" the device to put it in layman's terms).
Let me know if this helps or you have more questions.
So many policies, so little time :-D
Los Angeles, CA
BES Admin 4.1.5