Well, the strange thing is that there are 3 tokens each with the same number on them.
X-Wing has: 10 (x3) & 11 (x3)
Tie/In has: 12 (x3), 13 (x3), 14 (x3), 15 (x3)
Y-Wing has: 16 (x3), 17 (x3)
Tie/Adv has: 18 (x3), 19 (x3)
Your suggestion is interesting, but I don't see why they would need three copies of each number.
It seems like they might be used to keep track of something … and there are three places to do so. Seems a bit redundant, but possible.
Perhaps they are used to keep track of ships in a 'squadron', and are assuming 3 ships per squadron?
They also might be some sort of objective markers for scenarios.