That's annoying, I thought for 40 pin gbas, the type B cable fixed everything, but it's not that simple?
In fairness this is with only one GBA with one particular screen and cable. The 'interlacing' is subtle but it's enough that it would bother me if I used it a lot. I am going to try a Type-A cable along with the 'component removal' (outlined on pg.60 of the other big thread on the topic) to see if that gets me anywhere.
The Type-B cable seems to be working for people so who knows. My understanding is that the GBA has that little potentiometer for a reason and I know I've used it to fine-tune the screens on both systems I've worked with so far.
I have a new meter coming in today (yay!) so I have a perfect excuse to double check my statement about pin routing on the Type-B