Won't stay logged in, can't log in...

My PC laptop is working good. My Android devices suck. My tablet was working good with the https until I tried to use my 273 build link. That screen logged me out . Error message "Please correct the following errors: 1 Email addresses must be unique. The specified e mail address is already in use."

I just went in and reloaded my thread link with the https. Apparently it didn't automaticlly link to the http address.