Some pieces popped out of my super square one (looks like this : http://www.jpearly.com/image/cache/data/mf8-ssq-B2-500x500.jpg) and I had to put it aside before I could put it back in, it's been a couple weeks and I wasn't sure where they came out so I just put them in a random spot. I've never solved this one and while trying to get it back to square I keep getting stuck with one of the middle layers having 2 small pieces next to each other, is this normal or have I messed something up with the piece placement?