Forum:ME1 (BDtS) bug?

Good afternoon, I am currently doing another run through ME1 and have seemed to come across an issue that I haven't had occur before and am wondering if I did something wrong or if it's a bug/glitch and I'll have to redo the DLC or not.

When I landed on the asteroid, I went directly to locating all the engineers and towers/building first. Before turning off the torches. I found the first two engineers and my journal shows them checked off, the final engineer I had to find was Montoya, I found his body, examined and got the pop up saying he was killed by a sniper, but I found him before going to his building and reading the log, killing the security drones and finding the footsteps. I assumed it would register regardless and went on to shut the torches down and save the hostages in the main building.

Afterwards, when I spoke with the guy about the missing engineers it claims I have only found two, but my journal says I found Montoya except it's not checked off. So I went and found him again, but still no option to loot his backpack, nor is the game registering my find - it does say I have found him, it's just not checked off and when I go back to the main structure and talk to the guy it only says I have found two of the engineers still.

Is this the result of finding him first before finding his building, footsteps and examining his logs? And will this mean I need to revert back to a save before I went to the asteroid in order to complete this?

I can provide a screenshot of my journal if need to be.

Thanks.