I have two subscriptions and I don't understand why.

This is a user-to-user forum for the most part.  We can't cancel your subscription but you can.  

Sign-in to your Adobe account to confirm exactly what you're paying for and when the plan(s) expire.  

Photography Plan is an annual commitment.  So cancelling early could result in an early termination fee -- 50% of remaining months of service -- unless you can persuade an Adobe customer care agent to waive that fee for you.