No, that isn't what is going on. 

I had three rigs trying to mine lyra2v2 100% of the time.

A does 420 MH/s, B does 210 MH/s, C does 60 MH/s.

According to zpool A does 380ish, B does 75 MH/s and C does 40 MH/s.

I have verified that every single rig mines at the expected hash rate for ZEC and Ethereum on Nanopool.  I even went out and did a complete rework of my network.  There was no difference as far as mining goes, though I went from 70 ms ping to 20 ms ping and 2 Mbits up/down to 100 Mbits up/down.

Must be a problem with ZPool, right?  I switched rig B to miningpoolhub and it was not any better.  So it doesn't really seem to be a problem with ZPool.  Why does A almost work, while B and C are garbage?  And this was over a period of two days.   I have since moved over to mining ZEC on nanapool and they have been rock solid.  I still have rig A on zpool since it was making very good money.

Perhaps something is just odd with lyra2v2?  I have been thinking about joining a straight monacoin mining pool to see if there is a difference.

Of course, I haven't been able to connect to zpool lyra2v2 server for over 2 hours now...  Now all my 1080Tis are mining ZEC on nanopool.  Though I would love to switch them back.