Problem with the blockchain

? or Attack

?
In 20 secondes all blocks of this day are orphan on mining-dutch, aikapool.com and for my pool also... !!!!
see this address : 7SN4FWFF7MowkamuZ8mnWQ7dfcocLUhpD3
Suspect and not possible : All blocks are realized with this address since 1 day ( since block 2837515 - 2018-05-02 04:33:19 >>> to >>> block 2839589 - 2018-05-03 01:54:50 ) !!!
2 cycles of rewards without synchronization with the others core's on Internet network

?
Quid of the transactions of this day

?
NOT normal !