Other storage issue randomly disappeared..?

I installed MC4 and Jetpack Joyride today, and began getting low storage issues. Then, I updated HTCs make more space app to see what app was taking up my storage. To my suprise, it told me my other storage was down from 7.5 Gigs to 2 gigs. Thinking this was a calculation error, I opened the regular phone settings and found the same.

I installed a game and received the low space warning. After it installed I checked my free space and found I had more than before.

I believe the os will try to purge temporary files in this case.