Someone else originally created this plugin for me and I edited it to include an additional change server slots vote. Though not sure what the issue is, there's an occational bug: if the first vote doesn't pass - sometimes it'll pass anyway.
First time typing !playermode and the vote doesn't pass, so the vote doesn't do anything. But @ 2:48 it shouldn't have passed but did anyway. https://youtu.be/htNfP92Ulpw