Windows error after removing boot camp partition

I partitioned my hard drive for boot camp when I got it, and used Windows for a bit. I then decided to remove the Windows partition and use OSX only.

I used disk utility and re-claimed the partition size used for Windows. Cool.

Now whenever my computer's battery dies when it's in sleep mode, plugging it in does not recall Mac OSX (you know the gray screen that eventually resumes to Leopard?). On top of that, when I restart my MBP, it goes into a windows "non-system disk, remove and press enter" thing. I have to restart and hold down option to select Mac OSX, as if there was still a partition. But no windows option shows up.

I'm confused and this is getting annoying. I've checked disk utility again, it's showing one partition. There must be something that got left behind. Any ideas? I have thought about wiping and Time Machining it, but I'm afraid whatever is left behind will get backed up as well - not to mention having to re-register all my software is a pain I'd rather not have to do.

I really appreciate it in advance!