In the below screenshot, you see the "Riigean Prime Confederacy" has 2 subjugated dominions, but I'm not sure if he is subjugatin them or are those 2 empires subjugating "Riigean Prime confederacy??
because if I click on either of 2 subjugating empires below then "Riigean Prime confederacy" yelow mark will be in reverse order that is from right to left. so hard to tell who is subjugating who here.
edit:
oh nice

didn't know... I will update this post when I'm allowed to post links...
but probably you know what I'm talking about..