What's random about this?

I am becoming incredibly frustrated with this yarn. I thought I would have an interesting randomised striping effect for this jumper, instead there seems to be a strange phenomenon occuring. I was still using the two skeins, but have abandoned that as it was making no difference. I finished the back of the jumper and am about 1/3 of the way up the front.
I have also been into a local shop that used to stock a lot of yarn. They seem to have downgraded and had the most pitiful range I have ever seen! I am hoping to hit the city tomorrow - I ordered a copy of Stitch n Bitch at the library (cheaper than Amazon!) and have received an email saying it is there for collection. I can't wait to look inside. There is also a dedicated yarn shop in the city, so if SS is willing, we will go there for a look. Poor darling man.
In typical me fashion, I have become
obsessed with knitting; I do this from time to time. For a while there last year I was in search of the perfect bead, trawling ebay and local shops, looking at market stalls hoping some little old lady had died and her family was offloading some junk. That obsession died out quite quickly. I wonder if this one will too? Maybe not if there is a promise of something nice to wear at the end of it. After all, I am not really a jewellery type of girl.
Speaking of something nice to wear, and obsession, I am dying to knit
Tubey which I think is amazingly cool. I need to think about it though, we seem to have different yarns down under. I may put a question out there in cyberspace and seek the wisdom of those who have gone before me!