Luca - Thanks for the clarification
I think the answer is that we've interpreted the program in a different way.
for example, flat barbell bench -
I had a session to determine my 1RM.
Then I started ABBH.
for session 1 I do 10 sets of 3 reps at 80% of that 1RM value.
next time around I do 10 sets of 4 reps using the same weight as the previous week
the following week it's 10 sets of 5 reps using the same weight.
Then I flip over to doing 5x10 with 60% of the original 1RM value, then 65% then 70%.
I figured this way gives me three sessions of volume increase, and then 3 sessions of load increase...
I guess how you're doing it is to recalculate the 1RM for each session taking into account the increased volume?...
...I'd like to learn how you do it and the benefits of doing it this way - if you could explain further?