Pog primarily works the best on the machine you keep your bbp balance (as pog uses coin age to tithe).
If you want to mine on 3 machines, I recommend to set machine A up for POG, then machines B & C for solo or pool mining.
With 1187, is there a limit on how many times we can tithe and a max tithe amount?
In Phase 1, if POG Diff < 5000, and the supermajority has upgraded, we only accept 5 tithes per block, and the tithe parameters have not changed.
In Phase 2, after block 102025, the maximum tithe amount is 10 bbp, and we limit the tithe count to 75 per block (if diff is < 5000 for that block).
In Phase 2, after block 102025, if POG diff > 5000, we limit the tithe count to 150 per block.
Rejected POG tithes show up in the client as "The transaction was rejected by the network! Check your wallet to ensure the coins have not been double spent."
The BBP will not be subtracted from the users balance and the icon will show as conflicted.