Stock Alarm clock does not compute transfer windows properly

[SwerveM25]

The stock alarm clock transfer windows do not match the time for the transfer maneuver for a planetary transfer.   I did a complete clean install to do this testing.

Using Eve as an example;

To test it I installed the original Kerbal alarm clock as well as Astrogator and their transfer windows are a close match to the maneuver, but not the stock alarm clock.

Here is the planets position for the stock transfer window.

and here is the planets positions for the KAC transfer window.