Problem with multi DPI Play Store

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http://forum.xda-developers.com – I have 3.10.9 Play Store.. Flashed the multi DPI JB version. Works fine for a day or so then it'll revert back to an older version ( 3.9.something I think) and more than half of my apps won't show up under My Apps. It is fixed by reflashing the multi DPI Play Store zip, but I don't understand why it is even happening. Is there a permanent fix or anything I can try? Sent from my SAMSUNG-SGH-I727 using XDA Premium App (HowTos)