So I am just chilling at an alchemy station leveling up alchemy, and I get booted from server.
Trying to log back in and I get "Error 307 ((and an IP addresS)) Booted from server."
Lots of people have had that issue in the past, haven't seen anyone say anything about it lately. You might search and see if you can find any of the threads about it, see if there's any info you can get about how to get back on and finish.
I never had that problem, maybe because I leveled mine up in my houses?