Emails not syncing properly

So when I first signed up to mobile me my emails seemed to sync fine with my ipad and my macbook pro.... if i opened an email on my ipad it would no longer show as a new email on my mbp (instantly). It still does this fine.. but if I open a new email on my mbp it still shows as a new email on my ipad until I open it a 2nd time on the ipad....

Any one else getting this? and if so did you solve it and how?

Thanks