I'm building a travel site and will monetize with adsense. I want to make sure our set up is OK.

The homepage is travelsite.com

The category reads: travelsite.com/travel-gear

But then, when you click on one of the articles, the URL changes to:
travelsite.com/gear/example-travel-gear-article

Instead of "gear" it should remain "travel-gear" for SEO purposes, right?

I just noticed this, and have already created 120 pages and submitted fifteen articles driving them to these URLs.

Is it worth it to go back and fix these?

Thanks Warriors!