When you auto-completed this challenge, did so in a way where you skipped the part where the player gets to click on the completed item, which adds 1 to the Top Challenger triumph - I counted the seasonal challenges I have completed from week 9 onwards, and they add up to 42, however Top Challenger only shows 41/42. It's not going to be big problem for me, because I will have this one done after a few more SMG kills, but people who have skipped a number of these, it may be a problem