I think I found a solution, it's working now. I tried fighting after updating to RC 2 but the stacks number was still missing, so I did this:
I went under Display#2 > Stacks > Style
Then under "Parent Display" option, I clicked on the button next to it, and a window opened with 2 textures showing up, the Display 1 (texture for the aura), and the counter for the stacks number. I selected the stacks counter and accepted. After that I attacked the Target Dummy and the stacks showed up.
Thanks for all the help man, I really really appreciated it. And again, Thank you so much for your wonderful work with your addon, I've been using it for a bit now and my guildies started using it after I told them about it, we all love it
Have a good day and Thanks again!