That chart was on of the first things I found on this site. Seems pretty consistent with a couple others I’ve seen. It’s what I am going by. Both my snakes are very close in weight so Rat Fuzzies for mine until 200 grams is reached although I just got my male and he has not eaten for me yet. I initially fed hopper mice to my female but once she had 4 feedings moved up in mouse size and decided to just switch over to rat. Seems like switching prey can be difficult and at some point a mouse will not be big enough anyway so I figured I would do it now. She has wrinkles like pictured but she is also gaining weight every week so I’m going with the it’s normal answer.
I would suspect an under feeding issue would be a long process and doesn’t sound like your starving your snake. Curious how breeders feed more frequently as apposed to the pet colum. I personally go by the 5 day week, pretty much right down the middle between both those suggested feeding frequencies. Can’t say I found a supplemental smaller prey size ever recommended in between main feedings in my extensive research. I have seen on you tube vids how more than one pray item is offered during a single feeding session though.