You are correct, if you add a st (K 2nd st on LH needle tbl) and reduce a stitch (then K 1st 2 sts tog tbl) +1-1=0. Sorry I didn't explain very well.
The increase I was seeing was on the RH needle, leaving the available cast on sts on the LH needle deficit (not enough sts on LH needle to finish the row).
The problem I am seeing is this adds 2 sts on the RH needle and decreases the LH needle by 2 sts. This technique (K 2nd st on LH needle tbl, then K 1st 2 sts tog tbl) occurs 4 times on the 1st row. When I reach the end of my cast on sts, there are not enough sts to finish the row.
If you look at the symbol legend, the next stitch symbol is different but shares the same instructions. Maybe the next st should be done differently and I am doing them the same which is causing the problem.