Stacking Serial Numbers

I paid for a sub in October with my card. But today I have been charged again via Paypal …I forgot to turn off paypal re-occuring payments from a previous subscription, so now I have 2 serials. Is it possible to stack serials, I don’t see any way to do it via the program. The link to extend just takes me to the website.

@Ocoto

Yes I can help you do something like that. Please email me exactly what you want along with a link to this thread and I’ll get it done.
https://www.glasswire.com/contact/