Can’t say I’m surprised at either, but particularly the second point.
Could someone please tell me how the promotions work. Firstly there was an opening of 2 places for a sergeant and 2 places for corporal. 2 corporals out of 3 got promoted. All 3 applied and then a cadet who has been at sqn many years compared to the others. Call him cadet A. and 4 others cadets applied. Only 2 of the 4 got through to corporal. 3 months later, the other corporal received sergeant and cadet A to corporal despite there being no opening. This is all confusing.
Maybe some of the applicants were deferred, as in close but had some extra development to do before they could be promoted? Getting on some more off Squadron activities or finishing a classification are common reasons.
What Westlandscout said. It could also be that your staff decided they could justify an extra couple of spaces because they had suitable candidates.