Basic Problem with an en dash and alignment

I am setting financials and when I set them from scratch the enashes in the tables align to the numbers using an tab align to bracket. I have picked up an existing job and the dashes seem to be inset and I can not work out why. Any of you clever people have the answer I just can not seem to find. Tab is in correct position, no indents on cell and no paragraph or charater style is applied. As you can see in the image they just dont want to line up. But if I create a new table mine line up. What am I missing?