For the increases, just work them in rev stockinette on future rows. The cable will continue down the sleeve, but the underside of the sleeve will be all stockinette.
It's hard to picture what you're having trouble with without seeing it, for me, anyway.
I'd probably stick with the pattern and see what happens.
Thanks for the link--the sweater is beautiful!
Be careful washing the Cashmerino--it wants to pill.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry