On my 721 and 741, the controller is updated to the latest version and MM as well, that I could see.
It keeps stating NetworkBlocks found are 16+
Only it hasn't even been online for an hour, so 16 blocks regardless is impossible, and it's only pointed to your pool.
I brought this up with them but no response, was just curious if canaan had some reasoning behind this.
Getting very solid pool side rate with them, above advertised with this freezing weather.
If you point it at *hash or at an alt-coin, or point it here and at *hash or an alt-coin, you can of course find blocks that aren't BTC blocks.
Of course power cycling it should get rid of that '16' if it is only pointed directly here
Edit: and just to point out the obvious in case
If you do mine through *hash, you're paying an extra 3% fee and increasing your stale shares and increasing the chance of a stale block.
All 3 pools are your pools on it, it's never mined on another pool, so wondering why the blocks are so much.
Now it's at 172 network blocks.
Though best share is only 377 million.
Poolside hash rate is same as miner side, though I do have 6% invalids.
Well there are, on average, 144 network blocks a day.
When you said '16' I was guessing you meant it was showing more than the actual number?
Although there's 6 per hour on average, there's on occasion a lot more.
The actual network block count doesn't matter though, but it does sound like it could be ok.
If you check specifically when you switched it on (exact time) and check the bitcoin network since then, you can see if it is over counting.
e.g. if I say from 00:01 UTC 25-Jan to now:
height=449863 was at 2017-01-25 00:32
now is height=450157
so that's 295 network blocks since 00:01 UTC 25-Jan
If you are getting high "Rejected" in the miner, check on the Workers page to found out exactly why.
. Let's hope that when your second R4 arrives it brings us back some green luck! 
and guaranteed