Uptime on Availability Seems Wrong

Uptime on Availability Seems Wrong

In availability report, uptime seems a bit nonsense. If i want a report for whole of April, i will start the duration from 1 April 2011 (00:00) until 1 May 2011 (00:00). A report will generate, and uptime will be "30 Days 18hours". How come there is 18hours while April will only have 30 days?

Build Number  : 8723

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