Drop rates are too small to calculate on such a small sample.

And are you the player that has some sort of vendetta against farming Vlod? I can't recall.

If your theory is in respect of Vlod messing up the drop tables, how the heck would the game PREDICT whether or not you are going to farm him or not? You skipping Vlod at the end of the map should have no difference in the drop rates for Emma, Count, Duke, which you farm first. Do you think STS has some sort of time-machine algorithm that predicts that you will skip Vlod, therefore increases the Dragon drop rates on the bosses you kill earlier? That seems pretty unlikely. If STS was that advanced, they all be wining the lottery instead of making games.