Those unusual jumps are actually one part of the attack, the other part is tx spam which slows down most of tthe daemons and the third part is replacing parts of the blockchain with own blocks and thus causing orphans on most pools.
It's okay currently.
Does the transaction spam explain the sort of "phantom transactions" seen that appear on some copies of the chain (and confirmed as valid!), but are discarded as bad on other copies of the chain?