The hashrate monitoring seems to be working correctly. The only thing that could make it better is hash rate per each GPU (if it's possible).
Some posts above we discuss such feature. Need to make some research on it.
Edit: is it possible to display the hashrate running to different miners? For example, mining Equihash using Gminer and CuckooCycle using NBminer, both on the same rig (each one using a different GPU, of course).
This feature implemented in the backend, but not in user interface. So for now it's not possible to add some miners for same rig. But if you PM me your user id and rig id where you have some miners running I can to try manually add second miner and we check how it works.