Device Momory Shows full and then goes back to normal?

[Slick17]

Ok. So I just got my Omnia like 2 weeks ago. I have installed everything that I can to Storage card and not to the main memory, besides what needs to be there. Everything looks fine and great. The device memory was showing that I still have almost 15 mb of space left.

The problem is that randomly my phone gets that message that the storage memory is critically low and I need to delete stuff. So I look in the Remove Programs where my normal programs are that I can delete and it is empty.

So I do some soft resets and it doesn't change. Wait about a hour and then come back and my memory looks the same again (normal) and the programs all show up.

Has anyone else had this problem? What do you suggest to fix this? Thanks.