What I think is happening is that the stitch from the previous row gets wrapped around the needle and show it's color rather than the new one. If you slip that stitch, it just might be tight enough not to wrap around the needle when you tighten up the first stitch.
For example, if you slip the final black stitch in the final black row, hopefully your first white stitch will shine through.
"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