VRChat+ malfunction

Regarding VRChat+, why is it that after I automatically subscribe, if I receive VRChat+gifted by a friend, the effective time does not accumulate, but two VRChat+will take effect at the same time and expire after one month? For example, now I have two VRChat+that take effect on December 6th and expire on January 6th of the next year. These two are simultaneous and do not accumulate cumulative dates. Why do my friends and I need to pay double the amount and only have one month of validity,Is it just like this, or did I not notice that his abilities are just like this

Hopefully you’ve also reached out to VRChat support. As a user on the forum all I can say is that I thought they fixed that.

https://vrch.at/support