I have tried to re-label my products and they are not showing under the categories, I am wondering if I am missing something? I have a picture as the thumbnail for the category and I went into products and set the category but I am still missing several products.
@CarlaDiane I think you are missing patience 
It takes a few days for products to find their way to new categories as a lot of indexing happens behind the scenes.
If you’ve created new products in new categories - it can take a while
And if indexing is running slow - it could take longer.
Set it and forget it is my mantra (and check again in a week)