Hi there regarding the knife issue please find section copied from the BPA manual to which we should all adhear to "the rule book" so to speak
All FAI ‘A’ Certificate (Red) parachutists and above are required to carry a serviceable knife about their person, or on their equipment. The knife should be readily accessible.
So my humble thoughts only having 50 jumps under my belt, CH1, CH2, FS1 and B licence i would have not followed the JM instructions
Which DZ was it at?
A licence at 19 jumps thought you need at least 25?
Blue skies