First, good for you. I would never fault someone for hunting elephants.
Secondly, If I remember you were hunting a tuskless and a buffalo which can be challenging to fit in a ten day hunt if you are picky about the buffalo, let alone finding a shootable tuskless (without a calf).
If logistics fit in, I would expand the hunt to 15 days so you can have some choices on the bull and not have to shoot first one you see in a rush due to time running out.
Good of your outfitter to allow you to add the tag. Most would have added it on along with extra days.