Nintex Run if not equal not recognizing value

Hi,

I have an issue on a nintex workflow, so it's quite simple but for some reason its not working.

I have a paralel action with two branches with RUN IF action.

Left branch: Run if

                    Condition: If current item field equals value

                    Where: Field 1

                    not equals

                    Value:A

                   (then it sends out an email notification to person A)

Right branch: Run if

                    Condition: If current item field equals value

                    Where: Field 1

                    equals

                    Value:A

                   (then it sends out an email notification to person B)

The problem is that the workflow is sending the email notification to both person A and B, so the worklow is not differentiating the 'equal' and the respective value.

Any advice?

Many thanks,

Dan