Knitting mistakes

All the knitting I did on Monday night got ripped out yesterday and re knit...I hate when that happens!!! I was sure there was something wrong with the pattern...but alas, it was my mistake. I am working on the Mad Color Weave sock (which I have really grown to love) and am down to the heal flap...I just kept on knitting without paying attention to the fact that I had cast on the next size up, not the smallest, as a result of the designer's comments. Now I am glad that I ripped it out 'cause it really looks nice...major error free! Ah...the joys of knitting!!