The sleeves are nicely being blocked. Cotton is not giving in knitting , there is no flexibility so to sort out unevenness in cotton, blocking should be strongly considered. This is how I block;
I fill a bowl with lukewarm water and rest the pieces on the water letting them slowly absorb the water until all is sank, stir it gently and let it swim there happily.After few more minutes I'll drain the water from the ball and take the soaked dripping pieces into the washing machine , then spin cycle. When all done , I'll find an available mattress. my favourite is my son's spare one, the straight lines on the pattern make it easy to alienate the sleeves . Then it is a matter of pulling gently to the right measurements and pinning it down. Then its waiting, and when you think its done wait a bit more because although the outside looks dry the inside is still wet.
next is sawing..