I'm on Macs including the slaves.
Just to be clear, the issue here is that when you load a Play 3 setup, that single setup is loading samples twice?
I have noticed a similar but different issue on Play 3. The first time I load up, all seems ok (although I am NOT specifically checking to see if things load twice. I have not been paying attention to this). BUT if I then remove a sound from Play 3 and replace with a new one, Play 3 reports memory shortage, and steals ALL the memory of my 24GB Mac. Play 3 is running a memory server of it's own, and this was also playing havoc wit the Kontakt 4 servers. I have removed Kontakt 4 servers for now as a work-around. Play't memory server is cannot be switched off as far as I can see. I am running Play 3 inside a 32 bit VEPro server at this time to also protect my Mac from memory implosion from Play 3.
I am VERY suspicious of the quality of programming at EW btw.
B