Licenses

First Point:
I got new licenses to my computer that will end in 2017… but i forgot i have licences to finish in 2016 to the same computers. I want to know if is possible add the time remaining off the licenses that end in 2016 over the licenses that end in 2017.

Second Point:
I notice that after uninstall the license of Ary-PC, it continue counting like a used license… and when i reinstall it in Ary-PC, it is counting now like 2 used licenses… Is that correct?

Each working computer uses one license. If you uninstall, it should stop counting. You can solve this removing/adding computers at your Avast account (my.avast.com).
About the license period (and days), maybe open a ticket: https://support.avast.com. Please, understand that the forum users can’t address these issues.