While yes, I do use some portable apps, that is not effecting the duplication of entries, it is for literally every exe that has networking and there seems to be a maximum of 2 duplicates.
No path change, no name change, no hash differences, this occurs on my desktop, that I have not done a full reformat in quite a while but I have done a few “in place upgrades”, and it does it on my laptop, that has gone through a couple of full reformat’s, every time, on different GlassWire versions, it has never gone away.
You might want to ask me about some kind of settings or tweaks I apply to the registry, I can assure you that when Glasswire was on of the first 3 programs installed on a fresh version of Windows on my laptop, it still happened, fresh Windows, no kind of strange tweaks applied to the OS, just updates from Windows Update, install a few programs, reboot, and then whatever programs where listed get duplicated next time they try to connect.
Here is an example of what it looks like in Windows Firewall, this happens for both allowed and blocked.
There are two entries, in both Inbound and Outbound, the only difference in the rules is the number in the name, as if Glasswire is not scanning for, or somehow “forgetting” about previous entries but still keeping them in the list.