Why is Jack and Queen held over Ace in DDB?

[Ace Roller]

Just as the question says. In 9/6 DDB, the jack and queen is the prefered choice of the trainer over the ace even if the suites are different. Why?

Example: Jack of spades, Queen of diamond, Ace of Hearts, 2 of clover, and 5 of clover…Trailer will say to hold the jack and queen. Wtf?

[Tedlark]

WTF is right. On so many levels.