Nice jacket but sizing is off - Mountain Hardwear Ghost Whisperer Hooded Down Jacket - Women's

Great jacket in terms of weight and look. However the sizing couldn't be more off-the shoulders/armpits seem to be a size smaller than the rest of the jacket. When I try up a size, the arms were still a bit fitted but the rest of the jacket was way too big. Mountain Hardwear please fix this sizing issue!