I reported this bug back in May of last year, apparently to no avail as the bug continues to persist, making this achievement unattainable. I have attempted every possible way of completing this achievement - mounted, on foot, in GW form, but it does not matter how I escort a cart from the spawn point to the capture point without losing control (as the achieve states) , it fails to complete every single time. Is it possibly a Horde specific bug? I have not attempted to complete it as Alliance, but maybe I should try running this as the opposing faction (I actually think I have tried this in SL, now that I think about it, but will try again and update).
I recently attempted this achievement in a RBG group where the opposing group was throwing the match for whatever reason. I asked my group if anyone had this achievement , and anyone who had it completed it YEARS ago. This leads me to believe that this bug is new, well, new as of at least May of last year which is when I first encountered it. I’m willing to bet that if there was a way for a GM to search for completion of this achievement by the population, that nobody has completed this any time recently.
I opened a ticket in-game, and I guess the GM is giving me the run around by linking me to the Bug article on battle.net which just tells me to check wowhead where there’s actually 4 separate instances of people reporting this issue, and to post the issue on the forums where it will probably go unanswered once again, but here I go again in hopes that a GM that actually cares about fixing this will escalate this to the proper dept to test and hotfix this bug.