You're completely right, I'm sorry. It
appears that the Bulbapedia descriptions and Smogon descriptions differ, if I'm reading the Smogon one correctly. I don't know which one is right, and I'm sorry for answering your question incorrectly. I'll try to find out, but we might just be reading the Smogon description wrong and the person who wrote it meant that it doubled the critical hit chance, or Bulbapedia could be wrong.
EDIT: Marriland seems to agree with bulbapedia,
http://pokemon.marriland.com/hgss/pokedex/absol/, but veekun agrees with Smogon:
http://veekun.com/dex/abilities/super%20luck. Now I'm really unsure, but I think that Smogon's description is probably the right one, as Bulbapedia is user-generated and thus prone to error, while Smogon's facts are checked. Also, it seems pretty easy to misunderstand raising the crit rate one level as doubling it, because until level 4, it is doubling the last level. But I don't know, so I'll see if I can PM a mod or something.