Promotion bug

I chose to not add any of the given data since it doesn't really apply to the bug. (Chaos server, Cerberus, FC in question "Eclipse <<ECP>>")

The bug is a fixed/constant one in our FC's rankings.
There is a function to allow members to promote. We made a lead officer rank and a normal officer rank and gave the normal officer rank permission to promote.

However, for some reason this function seems to allow normal officers to promote themselves to lead officers, giving themselves more dangerous functions.

From my understanding the right to promote means you can promote members lower then yourself, but you shouldn't be able to promote yourself. Plz fix because it seriously hinders my FC's functionality. Thank you in advance for your understanding and support!