Party has had several issues among affiliate lately. Namely the Empire acquisition and the general lack of tracking they have been doing since the middle of next year.
With regard to your issue though, I’m not sure why you would expect all of your CPA poker players who decide to play at the casino to be rewarded to you a second time. CPA is definitely a one-time thing, if you want to continue to be rewarded for your players, that is what Rev Share is about.
Regardless, PP has some work to do to get back in the good graces of affiliates anyway, guess this is one more reason not to work with them. 888 has there share of issues too, but if you get cross-over CPA from them, I would promote them more heavily if i were you.