But when you go to their website and click on ANDALUCIA it takes you to the Continental Auto website. Interesting, eh?
Easy. Alsina Graells is a company that belongs to the Continental Auto group. The bus companies in Spain were too 'atomized' and the biggest ones have begun to purchase the smallest to create bigger groups. So, Auto Res, Sureste and La Sepulvedana are the Avanza group, Alsa owns Bacoma and Enatcar among others, and Continental Auto owns Alsina Graells.
By the way, I didn't know about movelia.es and it's a great idea, a site to find any bus route disregarding of the company that serves it. Thanks for the link.