I think it is a great idea to tag a common misspelling, if you have tags left to use.
Just a suggestion regarding spelling issues with your name or shop name...
My shop name is a misspelling of photographs to match my name, and after not being able to find my webpage after accidentally typing in the correct spelling of "photographs" - I ended up registrating two domain names. The correct spelling of my shop, and one with the correct spelling of photographs, which is redirected automatically to the first webpage.
You can do the same with tagging you shop name to your items.