I'm 65.5 inches and I wear my kilts 24 inches long, and they are just short enough not to be caught behind my knee when worn with a 1 inch wide belt - the wider the belt the shorter they are, unless I wet the leather and wear it pulled tight until it dries, which curves it and so it rides lower.

If 2 inches shorter, that would put the hem at the top of my kneecap - slightly brief for me, I think, but perfectly acceptable for many.

As for 22 inches being too long - maybe if the kilt is down around the hips - but hipster kilts tend to be worn long anyway -

But -hey - it's your kilt - if you order it 22 inches then you should get one 22 inches.

These days a length of 26 inches should not be all that unusual. People are growing taller these days, and if the kilt is being made from a 56 inch wide fabric there should be no problem if there is a good selvage. Even 28 inches long could be done using a few extra inches of cloth for the waist band and belt loops instead of taking them from the spare strip in the middle.

It might mean that many cheaper kilts are not going to be suitable - but it might also mean that there is less competition for those kilts which come onto the market which are the right length.