This yarn was bought years ago. I mean years like I was potty training years ago (not counting MJ of course). I knew about dye lots and always made sure that they always matched. Today I am less fanatic about it. Well I started this project about 4 years ago and while I just finished it and was getting ready to take pictures I notice this very distinct line. Yep it is right where I changed yarn balls. It seems two balls were different even though there labels were the same.it is much more noticeable in real life btw.