Thank you TryNinja for clarifying this.
Actually, my confusion came from the second line:
I have been using bpip for various reasons for a long time and never read carefully the label. I supposed it shows the number of self-removed posts... maybe because it's usually higher than the number of posts deleted by mods  
This is on of the situations where archiving posts come in handy.

So, obviously, this is not just a simple mistake but a blatant abuse. Hence, a ban is totally warranted.