We used this same cartridge filter for 2 summers before upgrading to a sand filter this summer. I had that happen a time or two, but I don't think that bad.
Did you follow the instructions on opening the plunger valves in the correct order and the air valve until water came out? Also make sure the filter is setting flat all the way down in the housing. One other thing, I think if the filter gets to old it will start to do things like that. Have you used it more than 2 weeks?
Maybe post a picture of your pump showing the hoses connected to the pool. That might help for someone to be able to give you more information.
Also, add your pool information to your signature.
Maybe the experts will have better information soon.