Sorry, I just looked up your account and you are using carts from 2012. They are an older model than what we currently sell.
Are you just getting around to installing them? Or have you been using them and this is a new problem?
It sounds to me like the internal bag ruptured. This cartridge should not continue to be used. You can combine our current model (without bags) to those which you are currently using - and simply replace it.
If in the future you feel this same phenomena with a bag filled cart - I would not apply too much pressure. Let us know if you have another cart that feels that way and we can review your priming method.
Let me know if you need more help.