Double layers showing on quiz results slide

I've created a course in Storyline that has a quiz at the end. The learner is allowed three attempts in which to pass. I'm using a counter variable for attempts. If the user does not pass on the third time they get to the results slide, they're supposed to be sent to a "Sorry, you'll have to come back later" type slide.

Both the "failure" and "success" layers on the results slide are set to "hide other slide layers". There's a trigger on the base layer that tests on two conditions, score and number of attempts. This is the trigger that sends to the "sorry" slide.

Here's where it gets interesting. Fail x3, no problem, works fine. Fail x1, then pass, no problem. Fail x2, then pass, both the "success" and "failure" layers show at the same time, overlapping each other. I'm moving the "send to sorry" trigger up in the list to before show either layer, but that really shouldn't matter. Two layers, both with "hide other slide layers" on should never show at the same time.

Has anyone ever seen something like this? I've been using SL since it came out, and have never seen this before, or ever heard of it.