By experience, i know that i always expect the amount of points to be incorrect, in both ways, simply because it's not an automatic process but a manual one from the front desk to credit them.

Sometimes for a fully paid stay i am a bit short by a few points, especially when having incidentals.

But some other times when paying with points (which are not eligible to points), i usually get more points that I should get.

Same as BinSabai, i only ask for my points if the difference is more than 2-3% otherwise i just don't care.