Hi guys. I exported a really simple map to Hammer from PeTI that included a button and a turret. That's all. In Hammer, I duplicated the turret two times but when I ran the map, there was 6 urrets as opposed to the expected three. Of course, they had all fallen over and were dead. I was simply wondering if anyone knew what could be causing this issue. Thank you.

I don't recall how the puzzle maker exports turrets in a vmf file, but if they are of the type "func_instance", you will need to open the property panel and set the "fixup name" of each turret to something different.
If you have multiple func_instance entities with the same name, they will interfere with each other.

Everything's either instances or world geometry in an exported map. The exporter gives each one a unique fix-up name to keep them from interfering, but copying and pasting does not. (It probably should, though.)