The violin in the shop has a label of Graneri. The actual name is Guaneri. Although the shop owner pronounces it right the first time, he then says Graneri.
The man steals 10 bullets. He uses 1 bullet for the first 2 men he kills. He then uses 3 bullets to try and kill the next man. When asked by his sister-in law when he is going to leave, he shows he has 4 bullets left. He should have 5.