I've had knots in other yarns, too. It just doesn't present as much of a problem with single color yarn. You do what you need to do with the knot and move on. Knots that I've found in self striping yarn, though, don't seem to follow the colorway.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry