Contests history data

I love Covers.

I love Covers because have the best contest interface and because its statistics are greath.

So, i was using Covers to trace my bet and have a detailed report about my performance.

But today, searching for the past data (NBA 09-10 & MLB 2010 data season ) I have discovered that this data are cancelled (rests only the totals in my history).

With my great surprise i have discovered that the NBA10-11 regolar season data are already deleted!)

So, how many time rest for the public the betting data?

I must search for a better site to trace mi performance?

:-(

sigh!