Hi,
Sorry but I still have issues with this.
Trying in a fresh Unity 2018 project:
1) now I see another instance of PUN on Ecosystem, which show an error when try to download
2) then I try the PUN2 as before, but it does not contain the PUN1 anymore, only Pun2 with Utils
3) went to your github and manually downloaded and created PlayMaker PUN folder
4) after this I can not download PUN demo to try it and it show two packages