Dani, advice we can offer, happily
The choice is your ultimately. What I can suggest right off the bat is to get rid of the scales. They really aren't your ally in this.
I'd continue lifting; and at the same intensity. To lose fat you need your muscle mass; to maintain that mass you have to work those muscles - lowering the weight and lifting more will not give you those results. I have a girlfriend who has been lifting weights that way for 10 years - her body shape hasnt changed in all that time.
The problem you're facing seems to be lack of movement on the scales. Have you lost inches? Do your clothes fit better? This would give an indication of fat loss and muscle development - your ultimate goal, no?
I've been doing some research of my own in preparation for 'what comes next' and I can point you in one direction:
www.bodyrx.com It's a program by Dr. Scott Connelly that focusses on fat loss in a manner similar to BFL. The key for Connelly is increasing protein. You eat more protein, you lose more fat - and he's got the research to back it up. Regardless of what comes after BFL for me, I know I will be lifting weights in some manner or another. Body Rx appeals to me in that Connelly eschews cardio. I kinda like that notion!
Goal weight? You'll know when you get there. Not the answer your looking for, I'm sure
But look at my stats - I have no clue what my goal weight is going to be either.
If you really are losing and gaining at about the same rate given a few months you will be ahead of the game. Newbies to lifting typically make remarkable gains in muscle growth at first - this does not continue, however. People in their 3rd or 4th challenge are happy to grow one or two lbs of lean muscle in 12 weeks. And do not forget that you're in week 10 right now; often dramatic results occurr between week 10 and 12.
Hope this helps some.
Nat