Абонплата за пользование Adobe PS

Charge is not based on the number of computers you install the program. As per the terms of your subscription, you can install the app on as many computers as you want, activate it on two and use it only on a single machine at a time. See the official word at the link below

https://helpx.adobe.com/download-install/using/install-apps-number-of-computers.html

Now rearding being charged twice, this surely means you have subscription to multiple services. Did you check you subscribed plans? What does the following link tell you

https://account.adobe.com/plans

If you still need help then you will need to contact support as only they can provide specific answers to account issues. Login to your account and navigate to the URL below. Make sure that the browser has cookies enabled, and all script blockers are disabled.
https://helpx.adobe.com/contact.html?rghtup=autoOpen
Type AGENT to avoid bots and talk to a human.
Also, be mindful of answering anyone who sends you a private message. See the following for more information about scammers
https://tinyurl.com/y7cfrr7y
-Manan