Problem with number variables

Hi all, the project i made includes a numberline which is divided into 10 equal parts. There are 4 numerical variables, two for each fraction (numerator and denominator). The student must fill in the 4 variables with the correct values. If he fills them up properly, a message box appears telling him if he did it correct or wrong. The problem is that: If he completes the second fraction correctly, the appropriate message appears. But if he completes the first fraction correctly, then the slide layer tells him that what he has completed it wrong.

I think, layers yes or no are not displayed correctly.

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