Why was Kit's Deck the only one without a Contract?

[Kamen Rider Decade]

Originally Posted by PrimoPiccolo

How then does this deck even exist? You know, if we're working under the assumption the Advent Decks Xaviax has been handing out each belonged to the Warriors of Ventara before they were vented.

You shouldn't try to compare apples and oranges.

Kit got his Advent Deck from his dad.

Xaviax is handing out the Advent Decks used by the original Ventaran Kamen Riders, that isn't an assumption they flat out said it.