fall sorority informal rush?

Not all the houses are eligible for informal recruitment; it depends on how many sisters a house has compared to everyone else. In general, the best way to be seriously considered is if a current sister vouches for you to the girl in charge of recruitment for her house, because there's no set schedule or system like in the spring. It's much more chill, you'll be invited to events with current sisters and given the chance to get to know them. It's possible to be offered a bid from more than one house, but you can obviously only accept one.

I assume you couldn't see yourself in one of the two houses because you did not feel confirtable with the girls there. Now that you know more people in each house and see where your friends ended up and how they feel about the houses, I'd think you know where you want to be. If you're meant yo be there, you probably have friends there who will vouch for you. However, if you are just trying to get into a "top" house for no good reason, then you'll probably end up disappointed again...
As someone already said, fall recruitment depends on how many spots each house has open due to seniors who left, girls who deactivated, etc. not all houses do Fall rush.

I found one house that I really loved, I could see myself being friends with the girls I talked to and when I walked into it, it just felt completely right to me and I was really happy. This isn't one of the Core Four or anything but they cut me before the last round. The two houses I had left I just couldn't see myself fitting in, I couldn't really picture myself being friends with those girls, etc.
The problem for fall rush is that I don't have any friends that are in the house that I loved! Most of my friends didn't join sororities and of those that rushed with me, none of them ended up at the house I loved.
Is there any way to still get into that house through fall rush without really knowing anyone in the house? Or is my best bet just to try again next spring rush?
I also liked another house which one of my close friends joined, and she gave my name to recruitment. I did like this one and have friends there, but I liked the other one a lot more. Is it better to just do fall rush for the second house since I already can be vouched for, or take my chances at spring rush again to get into the first house?
I don't want to be left burned in neither house if I rush in the spring again, but if I have a chance of getting in the first house I would definitely take that over the second one.

The thing is... you talked to 5 girls maybe. They know everyone in the house. If they invited you to pref they thought you would be a good fit. You have to trust the process. Unless you know someone who specifically said they want to help you out you have exactly .0000001 chance. Try emailing the recruitment chairs. You can always rush as a sophomore, it's really not so bad lots do it!!