Sorry for the double thread but no one has replied to this in the G2 section, hoping that this issue carries over to the Hero and someone can help/advise

I've had this problem multiple times now. I'll click on messages for example and it will open up something else I had open hours ago like gallery or my outlook email exchange. I close the incorrect program with the back key or the home key and try again and it repeatedly does it. :/ I'm starting to think I have a dodgy handset because no one else seems to be having this problem.
Am I closing programs wrong in the first place? I use the home key to close them most of the time.
Anyone else had this glitch?