View Comparison - Wrong Data showing up

I'm comparing the same view in two different databases we have.

In the result set, it shows some data from one view not appearing in the other (this is correct).

Some of the rows however stand out as having noticably incorrect data. The rows that don't exist in the other view are rows that were created in the last few days, however the date column doesn't always show that date.

So basically I get rows like this:

ID DATE
100 4/30/2007
101 4/30/2007
102 6/3/2005
103 4/30/2007

When I query the view directly against the database it comes back with 102 4/30/2007. That I've noticed it appears to have the wrong data in a few cases for 2 different date columns that I have.

So basically I'm very concerned about why it's showing the wrong data.

This is probably related, but I'm also getting multiple rows with the same ID coming back - which I wouldn't expect (and also don't get if I query the view directly).

So something like
101 4/30/2007
101 5/1/2005

If I query it directly I only get 101 4/30/2007

I'm using SQL 2005 - I'm using a standard view, not indexed. I've set up a custom key in the comparison to be a composite key of 2 columns which I know make it unique as I have another system which uses this view and requires them to be unique - the database I'm having problems with is currently being used by that system.