UID on the official Website is different from my UID i have in the Web event

Hello my friends! As the title says, i have different UIDs for the Web event and on the Official site, yet i used the same e-mail and same password. This confuses me a bit, should i contact the support of the game and if so, do you know how? I apologize for asking this question in a post, there doesn't seem to be a megathread.