I changed this permalink on the page to www.leslaas.com/les-laas-portfolio/ but it keeps going back to the old permalink les-laas-design-portfolio/ 

How do I change this?

I wonder if this has anything to do with the reason I changed the permalink I had on this page. I added a domain name www.leslaasportfolio.com which opens my les-laas-portfolio/ page. ???