About the speed...
I see that you stayed on the pool for no more than 15 minutes. Speed pool shows the number and diff shares that you send. I do not manage speed.
Several hours on your pool and still half of my actual speed. I leave.
try add d=30
-a lyra2v2 -o stratum+tcp://bigmine.org:5433 -u you_addres_wallet -p stats,d=30