No big deal. I wasn't expecting you to edit anything. I wasn't questioning this particular instance as much as just wanting to discuss the topic and see if I was missing something.
As DM, I want to encourage people to creatively use skills different from the one(s) I think are most appropriate at the time I set a challange. If I feel an arguement is good enough I'll allow even apparently inappropriate skills to be used, though I reserve the right to change the DC and/or the specific information gained.
Quick example - you find a (labeled) dose of an herb from an apothecary store. Typical checks would be Knowledge (Nature) or Healing to learn that the medicine is good for treating headaches and fevers. However, your character doesn't have either of those skills, so you make a Knowledge (Local) skill to learn that the locals use it to treat aches, pains, skin rashes, and male impotence. Normally, you wouldn't think that Knowledge (Local) would have any relevance, but with just a twist on the results, you can still learn something (even if it isn't as specific, and possibly misleading...)