I think for that program, you shoot for a 5 rep maximum. I wouldn't get bent out of shape if you do 6 or 4 instead.
You pick a few big movements that you know work for you. You then rotate through these movements.
Let's say you have close grip bench, medium grip incline bench, standing press, and medium grip bench.
You get 300lb on your closegrip for a record. Next time you do that exercise, shoot for a little more. Sometimes that won't be possible. If you know it's not going to happen, just go for weight that will really make you strain and be a maximum effort for that day.
If the overall trend is that your movements keep going up then great! Keep at it!
If not, then try some changes. Start with subtle changes and analyze your lifts to see where and why form is breaking down.