Zauberball - Stormy Skies #1508

I love this yarn, but there is an issue: I did not get the same length in every ball (I have ordered 4 balls in total). Two balls were way short, and one had quite a bit more yarn. I have not used the fourth ball yet. I ordered them at different times for 4 separate scarves so it's not like they could average out in one garment. The third ball I just finished had a knot in it connecting two separate lengths of the yarn. I did not encounter this in the first two. Given how expensive the yarn is, these issues should not be there and as much as I like the appearance and feel of this yarn, I won't be ordering it again.