I got help from Kristeen about the short rows. I will include the email here. I don't know if it helped too much. It was only a little clearer than the pattern. She left a comment on one of the posts asking for short row help that also had a little bit more info.
Bonjour chrispy--sorry for the delay in getting back with you--
luckily if you are using calmer there is a ton of stretch (hence the suggestion to use a stretch-y yarn for a sub)--that being said--my suggestion would be to put in a tiny wedge shaped set of short rows that would start when you get to the halfway point where the garment covers your bust--imagine if you would--just a little more room on the sides and underbust(which is where we need it--i'm a 34 triple d--so i have done this many times!
the reason we can't use the wedge shape across the entire bust is that it will distort the pattern in the center panel--so we are just going to sneak them in on the ribbing--i don't think you will need more than 3 rows--so start with that and try on to see how it is going--just remember to keep in pattern (rib) as you work back and forth---also remember that you need to do the longest row first, then make progressively shorter rows or your "triangle" will pointing the wrong way--also--if you think you will need more room we would have to repeat the triangle above the halfway bust point(but honestly i think you won't--and if you need help figuring this out--i will help )---so hopefully just one little triangle will work! --please let me know how it goes and if anything is confusing(still haven't had my caffeine injection today!)---merci, kristeen