When you're knitting in the round, you're really knitting in a spiral and that first stitch will leave a jog since it's going above the row below.
There is a method called jogless jog that supposed to help this. Jogless jog.
It's mainly used to line up stripes.
I leave the one-color jog on my knitting. It's kind of like a seam line, and personally, having to fiddle every row just isn't worth it.