With auto pull points, it receive 191/200

setting overrule pull point and setting it to 200 (exactly the same value of the auto-generated ones) the result is different: it receives all 200 point requested (and even more)

trying to track what changes, the main difference I found is that in this second case the SHQ prioritizes more pull point going south-east and that changes the final result.
Interesting enough, if I place a traffic sign on 123,13 blocking everything execpt pull points going north, once again I do not receive all 200 points.

I know why not all 200 point are received: it's because of AP exaustion, but the topic here is that setting a custom pull points value identical to the autogenerated one changes the outcome!