How do reviews actually work with experience points

This is my second time having to have other engineers review work that failed (IPtables Installation And Configuration). Each time, the cost for review is 50% of the points (i.e. 600, and for other engineers to review, they get 300 of those points). However, mostly everyone else, the cost is 25% of their points. What’s with the difference in my account? Can someone look into this please?