There is no time to fit so many events into one episode.
1) Zoey's Arrival
2) Preparation for Halloween
3) Meeting with Burke
4) A date with the chosen LI
5) Halloween
1) Zoey's Arrival
This can happen at the end of Interlude.
2) Preparation for Halloween
There is not much to do, it will be done off-screen, or very quickly.
3) Meeting with Burke
Yes.
4) A date with the chosen LI
Yes.
5) Halloween
Yes.
6) Talk to Jill to tell her about the "breakup"
It is almost obligatory.
7) Talk to M + J to announce the MC's decision
It is almost obligatory as well.
I saw quickly episode 7, there's a lot going on. I think all of that can fit into episode 9.