Oh my god!!
After +2 months working and take this??
Date & Time Description Debit Credit
2018-03-11 17:12 Payment for block 512944 0.00701715 BTC
2018-03-11 17:12 Donation to BitMinter BTC donations 0.00007017 BTC
On December for less than a month and with the same machine I take 0.05113840 BTC
Is this correct??

all depends on how many blocks you find in that period of time. Pretty simple concept!