So how often do you and how much do you increase every time?

I have misunderstood progression I believe. Adding reps is also progression. I will need to try to add reps aswell as weoght.

like on my bench press, I try to add 5.5 pounds every other week so it's like 2 workouts with the same weight than on the 3rd workout I increase, but often my reps falls down to 4 or 5 when I want to keep it at 6 reps. So I will switch to 3 weeks witrh same weight and add on the 4th.

discuss on