messages getting deleted

I co own a server with my friend but we currently have a problem with any message containing “HTTPS” getting deleted meaning any links that we send get auto deleted.

We have already removed all bots and checked all permissions and for some reason it keeps deleting messages.

Can someone please help us figure out why our messages keep getting deleted?

(also why is my username and pfp different on here then what i have on discord, is there any way to change it.)