To do that, rather than restricting which coins you mine, you can restrict which miners you use. If you only want to mine cryptonight, just untick all the other miners in the "miners" tab.

Yeah, they've been having some database issues over the last few days, probably due to unusually high traffic (mining profits are very high at the moment). If it's anything like the previous times this has happened it's just a delay, no data or rewards have been lost and it'll catch back up again in a bit.

I've experimented a bit with CPU mining and I think there's something odd going on with mining ETN on the CPU. Sometimes I get the expected hash rate, but quite often when the miner starts, I've observed that the first attempt to connect to the pool fails, and then it seems to be given shares at an abnormally low rate, resulting in maybe 75% of the hash rate I'd expect, or sometimes even lower. Restarting the miner a few times sometimes fixes it, but not always. Happens both with the xmr-stak miner and with Claymore's Cryptonight miner. Anyone else experience the same issue?

Other way around, assuming you're paying for power - it's quite attractive to mine compared to other currencies that makes the same amount of money per day, because it requires less power than most of them. Revenue is the same but profit is higher because costs are lower.

It works fine but you'll make less than on, say, MiningPoolHub. I recently experimented a bit and concluded that while something like AwesomeMiner that will sometimes tell you you're minding Digibyte-Skein at $9/day is exaggerating by quite a bit, you do make maybe 15-30% more on MPH (hard to tell you exactly how much more because the prices keep fluctuating). As a small-time miner with only one GPU though, I think I'll stay with WinMiner because it's far less hassle and it's much easier just cashing out to PayPal than mucking around with exchanging cryptocurrencies.

ETN uses the Cryptonight algorithm which is bottlenecked by memory access latency, not by compute speed. Your GPU's compute units are fully utilized technically speaking, but they spend a lot of their time not actually computing but rather waiting for data to be fetched from RAM, so they use far less power than with different algorithms that don't really have the same bottleneck and spend more time actually crunching numbers.

What kind of issues? All I've noticed is that it seems to update once an hour with an one-hour delay (so at 15:00-ish it adds statistics from 13:00 to 14:00), and that the timestamps are in UTC.

Is there a changelog for v1.101?

I've observed something similar with a GTX 1080. I turned off a bunch of not even remotely profitable coins and left only Equihash-based ones because those seem like the only ones that make any sense for my card at the moment, but even then WinMiner seems to prefer ZEN over the very similar ZCL (they use the same miner) even when the difference is something like $0.75/day in ZCL's favor (right now mining ZEN says $3.10/day while ZCL is closer to $3.70/day). It does switch occasionally but most of the time it sticks with ZEN if I leave it alone. I've experimented with turning ZEN off but it keeps switching places with ZCL in revenue, so I don't really want to turn off either one.

How much should we trust the $/day meter anyway? I wouldn't mind a setting to let me show revenue on a shorter timescale and/or a "actual revenue in the last 24 hours" meter instead, but I guess in the latter case that's what the web dashboard is for.