And Your Reward For Filling is... part 2

I recently autofilled and next game this Shield thing pops up stating, "You're guaranteed one of your selected roles this game because you recently autofilled."

but I got my secondary. X) isn't it where if your primary takes too long to queue up for your secondary acts like a secondary pick and outweighs it? I get how the system of picking roles works but the message was just straight funny as if we have more options... LOL I mean I already know I will be teed my roles XD I just thought it was funny how Riot did this to show that you are for sure going to get the two only roles you can pick.

Or am I misunderstanding this whole concept? Lol...