I have a gmail account running through an exchange server. I forward 4 of my (non-gmail) accounts to that one gmail/exchange email address. I've had a weird problem for a while now. When reading my email (on both the iphone 5 and the iPad), out of the clear blue, it will start redownloading all of my email. Since i do a lousy job of cleaning out my email boxes, this means that every time this happens (several times a week), it pause and redownloads about 1,500 emails. Any ideas?