The cpu time is based on individual cpu time so if I have a quad core crunching for 1 day, it counts for 4 days.

I have been crunching for out team since 2/16/07

Are you using the UD client or BOINC? The UD client is only recommended for single core CPUs. BOINC will automatically use 100% (may take 5-10 mins to get work for both CPUs).