Anyone think the hashrate/difficult of zcoin is a little low?

For the past few days my daily credits were about .8 to .9 zcoin, but the past 24 hours its only .67
Yet across the whole time the difficulty is right around 10,000. And the network hashrate has been anywhere from 60 to 90 GHs. (right now its 57, which sounds way low for a price of $17 per xzc)

Shouldn't the difficulty be much higher if the actual payout is that low? I put in my hashrate into whattomine, and even they think i should be about .85 coins a day. Is zcoin just not that good at providing a proper difficulty value that represents the current network hashrate? My guess is that blocks are being solved way faster than needed to meet their goal of 1 block every 10 minutes.

Or am I just an amateur who has no idea about how this stuff works (im ok with it if thats the truth, lol)