That must be it.  I would reset my score and still call him out.  A bitch, is bitch, is a bitch.  Any of the non-stacking players would agree...i.e Spartacus, MaTT, Cixx, Keek, Pt,  etc... You know they aren't bitches because they consistently join the hard-side.  There are other server stats that calculate stats differently than the wL system, I will refer to our old server where I played with pishtim.  He wasn't top 20 and he was still a map stacker.  All of the SiX players here would concur. 

I went to #1 because of duration.  Same thing for him, but he plays the easier side.  He barely has a higher kpd than me and he stacks. lol.  I'm not the best player, by far, on this server.  I am not a bitch player either.  Show me four screen shots when I am on the easy side of the map rolling the other team?  I unintentionally have 6+ of him.  Go figure.