Grummit, I looked into it last night. I saw where you completed the battle and then went to the Algerian Consulate to turn it in. Then, it looks like you filed a ticket and logged off. I'll have to look at it with one of the programmers to see why the mission disappeared without posting any errors. It looks like not only have you had really bad luck the battle, but have managed to find some really odd edge case while turning it in as well.
We'll try and solve this mystery as soon as we can, and then get you some help.