How do you prevent byobu from attaching to first screen listed?

I run rtorrent in a screen and have byobu setup to start with an ssh session. Whenever I start an ssh session (or run byobu for that fact) it simply attaches to the first screen that's listed by "screen -ls" which just happens to be my rtorrent screen and never displays the byobu screen. If I create another screen (i.e. "screen -S test") and try ssh again it'll attach to that one rather than the rtorrent screen.

There are two things I'd like to be able to do:
1) Tell byobu to attach to a specific screen name/pid
2) Prevent byobu from telling ssh-agent to attach to first available screen

How can this be done, if possible?