Text state doesn't work (variable triggered)

First, thanks for taking the time to provide a simplified file!

In the file you uploaded, the triggers to add 1 to the "score" variable were after the Submit__ triggers. The Submit__ trigger includes jumping to the next slide. The program can't run any remaining triggers after it leaves the slide. So the "score" remained at 0, even when all of the questions were answered correctly. 

However, even after fixing that, the problem persisted of the "3 of 3" message showing when it shouldn't. 

Strangely enough, when I reverse the order of the "change state..." triggers, it works--except for when all 3 are right!

In short: something is corrupted.  I suggest you submit a case directly to the Articulate staff. You can do that here:  Contact Support for Help with Any Articulate E-Learning Course Development Software

In the meantime, you could try completely rebuilding the custom results slide in the same way. Or use a slightly alternate method: create 3 separate text boxes. Given them all the Initial state of Hidden. Then use triggers to change the appropriate one to Normal based on the value of "score." Maybe that won't go wonky. 

By the way, you need an extra condition for the multiple-response question. In addition to checking whether the correct answers are Selected, you need to check that the wrong answer is not Selected. And, yes, use "≠ Selected." ("=Normal" doesn't work well, because the other states are based on Normal.)

Good luck!