I have not sewn it. But i have some ideas of how it should be done. I can see that the "pattern" is not very helpful.
The pattern has a "raglan"-cut, so the sleeve-pieces and the body-pieces are joined in the neck with a huge wrinkle. about 20-30 cm of the long side of the sleeve and 20-30 cm of the back and front pieces should be joined, and the short pieces of the sleeves and of the front and back (that are now sewn together) makes the neck. Maybe completely unintelligible. I will try to find a more useful description.
Wiki about raglan sleeve:
http://en.wikipedia.org/wiki/Raglan_sleeve
/Henrik, admin