You may have multiple subscriptions and to find them all just go to the Settings > Account Info page
and find the Active Subscriptions section:
Here you will find all subscriptions that you have.
Any team member that did pay will be listed there and you will see date from and date to.
Did you pay using PAYGO model, or Monthly/Annual subscription model, is it expired or active - they all are listed there.
Subscription price will cover the first upcoming month/year in full and later if your team will grow it will cover only part of the period
or in full if the amount of team members will be the same.
PAYGO is a one time payment model and depends on number of members that were tracked for the last month.
More details about pricing you can find here...