You made a choice to believe the new evidence. You chose your belief.
Is to want volitional? Is emotion volitional?
No, I didn't make that choice. The only choice I made was to examine new evidence but this new evidence may or may not have convinced me. The state of being convinced just happens to me and I can't influence it by wanting or not wanting to be convinced. Yes, it can happen that there is something that I rather not want to be true but if I've seen compelling evidence in it's favor then I'm convinced and there's nothing I can do about it.
Somehow it seems you are convinced of the contrary but since you're able to simply change your convinction to whatever you want, I suggest you just do it ;-)