[NSFW] Some Errors

Hello

Thanks for the great plugin.

There are what look like a couple of bugs.

There have been situations where I have incorrectly made a typo for a model and had a duplicate. Example ‘Kawasakai’ instead of ‘Kawasaki’
I have removed the incorrect spelling ‘kawasakai’ from the product but the incorrect version still appears in the drop down.

Additionally when filtering products on the parent category page, some models do not appear, and only appear if I search for the same model in a child category.

Any suggestions would be a great help.

The page I need help with: [log in to see the link]