Membership plugin - can get more than 3 levels/subscription plans


I've got two questions:

1) I'm paying $19/month, and my membership plugin seems to be using right API key but I cant add more than 3 subscription plans.

2) Also the pricing isn't quite clear for me. Do I have to pay monthly fee of $19/month to be able to get any number of acces/subscription levels, or could I cancel my subscription and still retain unlimited access/subscription levels(once we've got first issue ofcourse)?

Thanks in advance,