If I want to buy the "All Apps" plan in the future, should I cancel the other plans first? I bought Photoshop (Photography Plan) and After Effects (Single App Plan) already. I don't want to pay unnecessary money! Also, I would like to know if say, for example, I purchase the "All Apps" plan first, would it automatically cancel out the other plans that I'm currently under? Or would I have to ask customer service for additional support
Yes, that is correct, as complete CC will give you access to the complete app.
Should I still cancel the other two plans (Photography Plan & Single App Plan) before purchasing the All Apps Plan?