I'm a little slow in understanding
those are the TOTAL dice - at level 2, the fighter gets an additional 1-10 HP, giving a TOTAL of 2-20 points - yeh - these are 2nd edition rules unfortunately
Let me see again, with total you mean that the fighter can have a max of 20 hp at level 2 or that the score of 2-20 is added to the prevoius hp?
Does he roll a d10 two times and then pick one?, or do the two dices add up?
Sorry...