Mates - SW selecting LOCK over my selection.

Why does SW randomly decide to LOCK mates? I will go throughand create a mate (distance mates usually) and for some damn reasonSW decided it needed to be a lock mate. At first I thought it wasjust me clicking the wrong mate button. So I started watching thismore closely and it doesn't appear to be me. I selected distancemate, set the distance, hit OK (green check mark) and SW inserted aLOCK mate.

Anyone else experiencing this? I have been experiencing it sincethe SP3.0 update.
SolidworksAssemblies