Mod accounts are typically created specifically to be mods. I did the same thing. They asked me to be a mod from my lemmy.one account and I thought it was weird to be modding lemmy.world from lemmy.one so I spun up this account and it was made a mod.

Same thing happened with another mod (who has now been de-modded). That was a legit case of PTB where they started making unilateral changes to the community without consulting the other mods.