mate fails when dimension is adjusted

I have an assembly and one of the parts is mated to the assembly using some distance mate.  Occationally when I adjust the dimension of one of the distance mates, another distance mate will fail.  If I open the mate and re-select the same features used in the mate, the mate solves fine.

Any solution to this problem?  Or is there something in the way I have my mates deffined that cause this?

SolidworksAssemblies