Motorola Droid :: Email Force Close / All Emails Go

I have had zero issues connecting my Droid with my corporate exchange client, which has been fantastic and refreshing, however, in the last week I have had email tell me it had to force close 3x.Each time it does, when I go to re-open everything is gone, it goes back to the sync an account/enter email address set up. Each time I do it on the far left the bars are a different color (what does this mean), right now they are the color of this smilie.Anything I can do to stop this from happening? Are there other email apps that might work better and have this not happening? I keep 2 weeks worth of emails on my phone so when something like this happens it is not a quick fix to get back where it was.