to help you a little further:
what you are making here is the thumb gusset. that is a "shim" that you work into your glove to make room for the thumb. Look at your hand: it does get wider where the thumb starts. That is why you make this piece.
If you want to organise yourself I recommend using stitch markers (or loops of yarn hanging on your needle) to seperate the sections.
round 1: k2, [COLOR="Red"]MARKER HERE[/COLOR] M1, K1, m1, [COLOR="Red"][B]MARKER HERE[/B][/COLOR] k42
So when you get to the round 4, you slip the marker, M 1 knit the section of 3 stitches between them (the 1st increase, the k1 , the 2nd increase all from round 1) and M1 again, then slip the marker and work the rest.
this way you can see easily: all that changes is the amount of stitches between the markers. the rest stays the same.
check the increase videos up top for M1