literally nothing you're saying makes any sense, dude.
If nobody understands what you're saying, it's not an us problem. It's a you problem.
I'll answer your last question though. If you lose 20 lbs, you can expect to be weaker, ESPECIALLY when you only lost 1-2% bodyfat. That means you lost a ton of muscle. So I take it that your overall question is, how do you lose fat while not losing muscle at the same time.
The answer to that question is far too complex to answer in this thread without having A LOT more information from you. Cutting and maintaining strength is one of the hardest things to do in the lifting world. There are general principles to follow, like making sure you take your cut slowly and keep your protein intake and fluids high, but without knowing how you ate prior to the cut, and how you ate during the cut, there's no way to give you proper direction for the future. This is why people hire diet coaches. And I'm not trying to be patronizing or anything, I'm just saying that, if you really want someone to invest the time and effort required to help you properly, you'll need to hire someone. That, or read more. I doubt you've read up very much on the subject, since you don't seem to know where to start in explaining the situation in the first place.