You didn’t do anything wrong. Any Medium editor who drops a writer for writing in other publications is a moron. Publications are on the way out here. The Medium Partner Program is killing them. They used to be the key. I was a writer for nearly every publication that published poetry. That got me more followers (fans). That was good. Then I noticed a few (just a couple) of editors getting snotty. I don’t need that, or them. Nor do you. Again. You didn’t do anything wrong. There will be other publications. :)