"How odd" ? Not really.
Simple economics forces are at work in the market place.
J2 think that the fish will bite in sufficient numbers with a 70% contract;
so why pay more than you have to?
70% is not producing the numbers required, so the beancounters approve 100% for those niches which need it. But which fleet? And, what extra qualifications might they be looking for?
People still leaving for the sandpit, including those ready for command.