Amon's Reach- 10th Aniv. Hidden Victory Achievement Bug

So I just ran Amon’s Reach in the LotV campaign, and I had forgotten to check the requirements for the 10th anniversary achievement, which is to complete the mission building only probes and dark templar. Well I did not do that, I also had centurions and dragoons. But it gave me the achievement anyway. I think its because I only used Warp Gates instead of gateways, maybe there is something in the code that doesn’t recognize warped in units as “trained” normally. To be honest i’m not going to complain after the “Your life for Auir!” achievement if one wants to help me out a bit, but i thought it was interesting, and might help explain any other bugs you come across.