That's because in all honestly there's no right answer. There's been no scientific studies on this so it's all based on personal experience. When you have mulitple successful breeders using different methods, it can seems like there's conflicting information because some breeders think their way is the way (not aimed at anyoen herel just to clarify). but it's not really. It's just that there's more than one way to do it.
Personally, I've never had a overweight BP. Most of mine have been underweight. I would think you'd have to nearly forcefeed a BP to get it fat in an unhealthy way.
If you have a mature female that's 1200g and you want to pump her for breeding then I see no problem feeding larger or multiple small meals to get the grams on. Just don't force it. My smallest female was 1050g in July and had never been above 1200g. At the advice of a fellow breeder I fed her 2 small (75g) rats a week for 3 months before I was satisfied and cut back. She's 1600g now.
Anyways, your snake in over 2000g which is plenty for breeding so I personally don't seen a need to provide extra meals.