I was getting duplicate name for the column header in table design view
I think It was because I was swapping column headers with the same name and did not save in between each. the issue was that the first row for the first column would be the one highlighted in red. I nice feature would be to highlight the actual one.
Also for it not to dumb all your work and just not let you save it....because when you do, all the work goes away, as another suggestion.. I should be good now thank you!