Hi Nick,
1) They shouldn't - as long as you have not purged any or your history records. We'll need to see the data to track this down if this behaviour is repeatable.
2) Sounds like a problem with the report when it is printed with those specific options. We'll take a look and see if we can re-create the problem.
3) The numbers should match (assuming no history has been purged)- perhaps it's just the specific report options you are using. Can you provide an example?
PS - Isn't it "President's Day" today?
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Andrew Bates