Nokia Lumia 920 – incorrect email syncing? emails won’t stay deleted on phone?

Hi,

For some reason, my phone is not properly syncing up to hotmail/outlook email inbox?

I notice that some deleted emails whether done on a computer or on my phone will come back?

Know how i can fix this? it's getting annoying.

Also, any word on a proper credit card swiping app from a reputable 3rd party is on the way (i.e. square, paypal, etc)?

thanx!