design mode is what you see when you initially open the CR environment. When you hit the preview button, then you are not in design mode IMO. Yes you can move items around and change formulas, but it is supposed to be mimicing the display.
Another way of looking at it, and this is if your report is called from an application...when the application calls it, it is not design time but run time.
If you never use an application, then you are probably always in design time as you can change the report.
I guess that is the easy way of looking at it, if you can change the layout or functioning of the report, you are in design time, otherwise you are in runtime.
so what I am asking is can you click on the preview button for your report and see the report as you envision it is suppose to be displayed. If the answer is no, then the report doesn't work. If it works when you hit the preview button, but not when you call it from the application, then one would suppose that the data being sent from the application is faulty, but if doesn't work in design, then it doesn't work and it is not the application...
so in short, I'm trying to determine where one should start looking to find the error.