Sounds like one of those unexplained glitches. If it's working now...go with it.
On another note...if your lockscreen is just set to swype...why even have a lockscreen? Just disable it and you'll have one less step to get to your phone. I don't use a lockscreen at all and when I press the home button...I'm right on the home page. The whole purpose of using a lockscreen...from my understanding...is to provide some sort of security measure that only you know (pin, pattern, face recognition). My 2¢.