I see what Dirz is asking, I think. It's an order of math issue, and if it supercedes.
My reading of it would be:
-20 racial stat bonus +25 racial skill bonus = +5 to that skill
neither modifier superceeds the other, they just both apply, the end result being that the penalty is swamped.
Keep in mind that if you word it "+25 to stalk/hide skill" then it applies on both sides.
So while the elf only gets -20+25=+5 to hiding, their stalk ends up getting a double bonus. . . .
A lot of these "It makes common sense" fiddles tend to cover over flaws characters have due to the system mechanics. . .this way lie dragons. . .grab bag skill bonuses, similar skills, and all sorts of those kinds of problem areas.
if your character's background/culture likes to sneak. . . .then purchase ranks in stalk/hide in adolecence and apprenticeship. . .your amazon tribesman is not racially a better hunter than a suburban computer engineer, he has more ranks in hunting applicable skills. . .the same should apply to non human races. All these tweaks and mods are variations on the theme of "Can I have something for nothing?". . . .players are always mumbling that, but I find that GMing it's best to make them work for everything, then they cherish it more, and have more fun, rather than getting bored, or attacking each other since none of the NPCs can challenge them anymore.