Board Thread:General Discussion/@comment-50.131.1.29-20131103042015/@comment-16285760-20131103061014

Because when you uncrew someone and have no unallocated SP, it takes 2 off your HP and AS, and 1 off your DS. You can get those 5 SP back if you crew someone else, and then you can put those SP into some other stat. Check your crew list, you might have an empty slot on it if you think you're permanently losing SP.