angle mat keeps flipping

can anyone tell me why my angle mate keeps flipping?  i have a SMALL assembly with a configuration in which two parts are fully constrainted, one of the mates is an .  angle. whnever i change configs, then go back  into it, the freaking thing is flipped!!!!  what a joke!!   i have had to delete the mate, add it AGAIN, at least 5 times today

any insigt would be appreicated

TM

SolidworksAssemblies