Historical Uptime report - lots of errors

My Historical Uptime reports seems to have a few problems e.g.

chrisjj.com Historical Uptime

a) “%s Last Updated” heading - corrupt
b) http (and others) “Up for 3 years 1 mon.” - wrong (predates service commencement by 3 years)
c) http 1 Day, 1 Week, 1 Month, All Time - values missing
d) http “Last Updated -1 secs ago” - clearly wrong
e) smtp and pop “Up forever!” - clearly wrong
f) smtp “Last Updated 1 mon 6 days ago” - wrong (predates account commencement by 6 days)

Any idea what’s up, Support?