It looks like negitive mining balance from the last block 
i have negative balance too
it's bad have negative balance
we pay for GH and wait them pozitif something
this remind me joke :
a neutron enter a bar and ask for a beer :
the barman (a proton) said : for you it's free of charge .
neutron : are you sure
proton : yes I'm positive
:-)
Ahahah
it looks same
i hope it returns positive as soon as