Missing something in Extended Checkbox widget

Hi

I am using Jim's Extended Checkbox widget to create a custom quiz in CP 7.0.1.237. My requirement is quite simple. I must admit that I have done this so many times earlier, but this time I am just not getting it right.

Requirement:

I have four options out of which only two are correct. Let us say, the options are Plan A (var name: PA), Plan B (var name: PB), Plan C (var name: PC), and Plan D (var name: PD). The correct answers here are: PB and PC. I have created the variables correctly.

So, I have created an advanced action with just one decision to validate them.

If

PA is not equal to "Plan A"  AND

PB is equal to "Plan B" AND

PC is equal to "Plan C" AND

PD is not equal to "Plan D"

then

Show CorrectFeedback

Else

Show IncorrectFeedback

Expected result:

Correct Feedback should appear only if I have selected Plan B and Plan C and I have not selected Plan A and Plan D. In all other scenarios, I should get Incorrect Feedback.

Actual result:

I am getting incorrect feedback even when I have selected Plan B and Plan C and I have not selected Plan A and Plan D.

What am I doing wrong? Thanks in advance.

Sreekanth