I do maybe about one or two and then it tells all hits are done and we cannot let a worker do more then one hit. To find other listings. I have every browser except Opera installed and what others I might be missing and would be compatible. Seems to work on Firefox but I still get the message after one or two hits. Any advice?
That is normal for Redwood HITs. Ignore the available count - its fictious so they gain visibility. They may list over 100 available, when you accept they say nada.