the dbix team makes some changes in algorithm i think
for control the diff but its not yet fixed i think
wallet and mining behave is very weird
some thing is still need to be fixed
and price is also going down again 3.50 $ for right now
i think dbix needs some more time the fixed these errors like wallet block error after 90000 block number
and in network diff but avg block time is ok but increasing slowly for now avg block time is ok 

there are ~ 10 or more pools - did you check all of them? and this high hash rates are often from nicehash power

Network difficulty is rising dynamically with the available hash rate in the network

today we see it shows 70k+ as the network hash rate also doubled with the pump