As a point of clarification, we have a scoutmaster in his first year of service. I also do not expect him or the committee to re-test any scout on each of the requirements for advancement. As a committee member we do ask questions about a scout's advancement but not each and every requirement. As a committee member I am interested in how the troop is deliverying the promise to the boys in the troop, what we can do to make the troop better from the boy's perspective- basically serving as a quality control check for the troop.
As a committee member, I became aware of this situation because the ASM for this patrol noted that the scout had placed inaccurate dates and the initials of the other ASM assigned to this patrol. The scout did not put his initials, therefore the scout did not sign off his own requirments.
We have never included the patrol leader as a part of the review of a scout for advancement. Some scouts could have several patrol leaders before making a rank advancement. That could be difficult to have involve each patrol leader. Do you have them speak to living the scout oath and law? Not all patrol leaders go on campouts or are able to attend every troop meeting.