Here's an interesting observation. With the last campaign I stopped logging in my mules at 1000 points, kept logging in with my main everyday after that.
I'm turning in my points now and it seems all my mules have the same number of points as my main... which is awesome if it means I only have to login with one character during the next campaign.
I don't think the first campaigns worked this way as I distinctly remember having different point values on different mules. Can anyone else confirm that you only have to log in one character per account?