Perhaps a bit unkind.....
The reasons for early starts and late finishes is it means they can work with less crew, and right now they have a lot of crew in wrong places, trained on the wrong types and to the wrong S.O.Ps to make the numbers work enough for a quality roster.
It will take time and realistically, until the 145 is taken out of bases like SOU or IOM, etc and pushed back to BHX and MAN, then a FlyBe S.O.P. introduced and the type operated by crew also working Q400 or 146 then these problems will continue.
The logistics folk clearly have made the odd mistake, but they at least think on their feet and have a go, a definite improvement. We all need to blow off steam sometimes, blowing it off at each other isn't the right thing though...
Some crewing errors are understandable, but if we keep being polite and civil, we'll get them trained up eventually!