Mail app keeps marking read emails unread.

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I have an iPhone 4 on 5.0.1 that is jailbroken. What the problem im having is that i have my hotmail and gmail accounts on my mail app and i read them all and go do something else. Then i turn on my phone like an hour or so later the emails i had just read are all unread again and i have to read them again. I have the mail app set to retrieve my emails only when i open up the app by the way.

Any way i can fix this? I didnt have the problem when i was on 4.3.2.