Comodo Memory Firewall flags explorer.exe (2) Resolved but questions remain.

I took the gamble and killed the explorer.exe that Memory Firewall was referring too. I started the thread incase this was a false positive… but I found out that two explorer.exes were present during the time of the prompt.

Can someone explain to me how this might happen (the second explorer.exe)? I was uninstalling Seagate Manager (backup software/Add Remove Programs) at that time and the window froze after it was done.