You were spitting until you reached Mihawk. Mihawk's bounty is pretty damn ridiculous, given he's an underling, with no territories, no crew.
They all got those new bounties after CG is formed
Not before that !
So unless Mihwk got that bounty before CG was formed and didn't join Buggy and Croco,
His bounty is inflated.
he was part of WG, everyone who was a warlord got that warlord inflation tax on his bounty
Loki is the only one beside Kid and Luffy to get juge bounties without ever joining WG or Yonko