Poker Odds Calculator.... something weird I found

So I was messing around with odds calculators and came up with something weird, it's a small thing that will never effect me I suppose, but I just don't understand that math behind it and it's really bugging me. If someone could set me straight I would be really happy:

FLOP: Kc Kd 8c
HAND1: Kh Qd 76.8%
HAND2: Jc 6c 23.2%

But when HAND1 holds one of HAND2's Jacks, we get

FLOP: Kc Kd 8c
HAND1: Kh Jd 72.9%
HAND2: Jc 6c 27.1%

So HAND2 improves by 4% if HAND1 holds a Jack. Why is that? HAND2 can never make a straight draw, and runner-runner full house will never work because HAND1 will always make a better full house. It looks to me like HAND2's only out is one of 9 spades, so what does it matter whether Hand1 has a jack or queen?

You need to look at it from the standpoint of what happens to the Kx hand when the flush card hits and you'll see why.

WVHillbilly said:

You need to look at it from the standpoint of what happens to the Kx hand when the flush card hits and you'll see why.

Click to expand...

Ding ding ding

Ohhhhhh I get it, damn I'm dumb... if HAND2 turns the flush, now HAND1 is on the draw, and there's one less jack for him to catch to make his full. Thanks, I thought it was going to be something dumb but that is actually quite important I think!