Wow, there's nine of 'em, and they forgot the hammer and sickle on the flags. Strange for dedicated lifelong commies.
Yes. I notice plenty of variations on the Soviet theme in small party and organization flags. It also could be that the official Communist Party expropriated the old USSR flag. This shows that Soviet revanchism is broader than a single doctrinaire party; it's a mood rather than a platform. They just want to be feared again.