I'm back mentioning this problem again. I think I may have to get it checked out. Today I was stopped on a hill with someone behind me. I was in D (automatic) and as soon as I lifted my foot off the break I was rolling back. I placed my foot back on the break, took it off, and as soon as it started rolling back again I grabbed the handbreak and did my own hill assist. I feel as if I should not have to be doing this. The hill was not even extremely steep.