I'm sorry if this has already been asked - I tried searching the forums and couldn't find an answer. Possibly there isn't one.
I'm knitting a baby blanket and was happily going along when I realised I'd purled a few stitches instead of knit so I tinked back a few but while un-knitting those few stitches, I accidentally picked up the two threads, ie. the lower stitch also. Is there anyway I can fix this double negative?