After a diagram found on http://tricrodatuka.blogspot.ro/2012/09/bem-casual.html

The sleeve was too wide after working according to chart, so I had to frog 1 shell row in the round and join front and back sooner (added ch 9 under each arm).

When finishing the sleeve, I first worked 3 more rows (1 shell) forth and back, while decreasing 10 st on the first 2 rows and 5 on the 3rd (the actual shell row) = a total of 25st decreased, 84 st left.