As above. Get the first coat “under control” ie edges looking tidy and no misses, before doing second coat. If you can’t do that, you’ve got bigger issues
My moneys on it being mega absorbent cos it was old so you had no chance. If when you PVA it, thePVA dries instantly rather than hanging around for say 5 mins and going tacky, then it needs more PVA.
So am I best letting it fully dry, applying pva, then starting again? I probably could get away with it as it is, maybe just need to sand a few bits. I just cant seem to get consistency of plaster right. Its either too runny and its dropping off the trowel or its too thick and its almost drying as its going on. Going to end up wallpapering over it at this rate!!!