The reminders should only fire for those who haven’t accepted it yet. As soon as they accept the policy then they shouldn’t get any reminders to accept it again until the Renew period comes round for them (whether 365 or 730 days, or shorter/longer).
I am not sure why @bionel would be receiving the reminders after having accepted the policy. 
We use this plugin a fair bit internally, and I’ve not noticed any issues. Are you receiving any extra reminders for it too?
It may be possible to create a data explorer query to have a quick check of acceptance versus reminder notifications. Let me see…