You are actually very lucky the system still boots at all. Once you make a BC partition for Windows you really shouldn't fool around with either partition. If anything that unused space is only going to be available to the Windows side as it was originally created by BC for Windows. If you try to move it back to the Mac side more then likely neither OS will boot.
Well, you can't resize the way you did it. You can only take from one partition and add it to the other if they are the same format. Think about it: how can you add NTFS formatted space to a Mac formatted partition or vice versa? Not possible. That's why the space isn't visible to OS X. There are third-party utilities that permit this, but for you, at this point, I suspect starting over will be your only solution: I.E., using Boot Camp to remove your Windows partition, then reinstalling.