Well, as I understand it:
Elf starts at Dex 8, buy 8pts at a cost of 10 to go up to Dex 16. Add +2 Racial bonus to go up to Dex 18.
Half-orc starts at Dex 8, buys 8pts at a cost of 10 to go up to Dex 16 and has no racial bonus (which is ok, because he's a clumsy half-orc). But if he then...