Hi,
I don't understand your sentence
But the category generates
www.iheartsin.com/category/clubwear
, goes to a 404
Categories do not generate anything. They have a link to them displayed somewhere on your website and the link can go to a valid page or generate a 404 error if something is not configured properly.
I checked your website but I couldn't find anywhere where the URL
www.iheartsin.com/category/clubwear
was used. All the URLs I could found going to the club wear page were using the same URL
www.iheartsin.com/clubwear
.
So I can't tell you what to change in your configuration so that it produces a valid URL as I don't know what is generating that URL. Could you provide more information on that ?
You can use mass actions on categories.
Personally, I wouldn't bother much on the URLs of my products. As long as it is somewhat OK, it's fine. The main thing is to avoid duplicates by entering one valid URL in each category/product. Letting HikaShop fill it for you is a good idea as it speeds up the process.
Aliases for products/categories are not really necessary for English. They are mainly for non latin languages where a latin letter representation of the name of the product is often necessary. If you have aliases fine, but don't bother with them.