I concur about the PI tri shorts! They feel nice in the saddle, but I hate the shorter length on them which really emphasizes the sausage leg thing. I also can't stand the drawstring...infact, I hate drawstrings in ANY cycling short...which may be why I prefer wearing my bibs more - no drawstring, no binding at the waist, etc.
But yes, I too have the chamois bunching up front issue. My shorts fit great everywhere else, but when I'm seated on the saddle...I notice this huge "bulge" of folded up chamois right on the nose of the saddle. No wonder I am constantly shifting around, lifting a leg to readjust, etc. I'm sure all that extra chamois material up front is the culprit in many (if not all) of my ongoing saddle issues.
2012 Seven Axiom SL - Specialized Ruby SL 155