I contacted them this morning and they gave me an idea of what's happening. They are experiences problems with the "queue that handles Adwords", and they trying to fix it.
I had contacted them because I am getting about 20% of the results I used to get with certain filters. Where I used to get five or six pages of 200 names, I am now getting only one page.
ExpiredDomains.net is an amazing free service and I am very thankful to them for all the great names I have found there. I appreciate it even more now that it's not working properly. No other free site like it.