I'm aware of the stacked graph issue. The trouble is that there are some situations that a stacked graph makes more sense (e.g. distance), but doesn't make sense in others (basically anything other than time and distance). I could add more check boxes and what nots to let you do what you want, but having more gadgets on there will scare people away from using it. That is also why I created a basic and advanced graph pages. You can, however, select the XY graphs, which will graph individual runs, and tend to look better with more data. I still need to add more canned graphs to the basic page, but not sure what are the typical graphs that people create.

As for the site not remembering you, do you have cookies enabled? The site places a cookie on your computer when you check the "remember me" option. If you don't know what I'm talking about, let me know and I'll guide you through it.