Currently there are 5 warlords that we know,
Boa, Buggy, Weevil, Kuma, Mihawk.
Do Doflamingo and Moria still have their titles? When Luffy defeated Gekko Moria the navy wanted to save Moria at all costs to not have to fill in another gap so does he still have his title?
Or are there two we have not met yet?