I just checked your authorities on https://steemd.com/@acesontop
You allowed plenty of accounts to use your posting keys.

you should sort them out and THEN change your password. When sorting, I think it is most important to remove buildteam from the authoritiies list.

A little how to is here:

https://steempeak.com/steem/@luegenbaron/how-to-revoke-posting-authority-and-change-master-key