Your block looks wonderful! As already stated the points match, and you still have 1/4" on each side of the block for seams allowances. I think if you square your block up carefully, the top of the block will have a sliver to cut off in the center without cutting off points. It will probably be enough to make the block square enough. If you start taking out seams, it can stretch your fabric and you could have more problems! It seems like you have enough info. now to thoroughly confuse you! I hope not. Enjoy the process!