I am not sure where you are seeing this, could you provide us with some details?
ShadowBot does not up vote posts with less than 12 hours remaining. I looked through your account and see your latest posts are getting up votes:
You can see here over the last day, 10 up votes on your post (https://steemit.com/@sanmi/weekly-movie-gif-contest) the latest 4 hours ago (as of posting): https://shadowbot.us/shadowbot/post.php?post_id=5193104