I have include three images from the affected screens.
Firstly the "This Year" selection on Records:

Note the High Daily Rain. It is giving 12 December 2012 as the highest, wrong value and not this year. 12/12/12 was a dry day! Note that the value is the same as the highest Month (November)
The "All Time" selection gives:

This gives (correctly) Dec 2012 with the 'correct' total.
Finally selecting "Dec" gives:

With the correct value for monthly rainfall.
Is a parameter/tag getting read incorrectly somewhere?