Let's say I got 5 real-mail & 5 junk-mail. My Samsung Email app would notify me of all 10, which confused the hell outta me for a little while because I'd log-in & only see 5 emails. Also, the junk-mail's most definitely going to Hotmail's default junk folder. I sort of solved the problem when my car burned to the ground with my phone in it though, lol.
(so far my replacement doesn't seem to be doing it)