is not the most usual... but it happens... why ? idk... each case is different, I guess
actually everybody can change their mind anytime... like in the real life... it happens
for me the "irritating" part is when the CH ask for changes, variations, feedback, etc,... and in the last minute just select a totally different design that was not participating during the tournament....
and the "good" part is when it happens to me :-) ... a lot of times I was just in the gray zone, or even NI, and asked to me to reinstate or just suddenly I was 1st and I won... it's nice ;-) ... like when you found $$$ in a pocket