I've got an odd problem.  This house I've started bowling at has me completely backwards.  It's an easy shot, although there's not much of a wall, and it's the most difficult house shot in town, it's still really easy.  I just can't score there.  I throw much better shots there, the scores just don't reflect it.  It's little stupid things, like the game I started with last night.  First two frames were strikes, next frame my wrist pops, and I wasn't able to pull up, so I left a washout, and opened.  Irritating, but it happens every once and a while, so I wasn't too upset about it.  Couple more strikes then a 10 pin.  Next couple, then another 10 pin, I strike out for 223.  I won my point by 1 pin, but I thought I'd bowled much better than the score showed.  The open killed me, but I took it anyway.  Next game I get the first 2, then found a little track burn and it nosed.  Then I get a strike every other frame, and it's either a 10 or a 4, but I spare all of them.  I ended up with a pretty dismal 4 game set of 758, but maintained the average at least.  

Tonight I bowled a bi-weekly tournament there.  First game my wrist popped in the first frame, so naturally that was a washout.  Then I got the next two, then a 4 pin.  And then I had more issues with the 10 and 4 the rest of the game, 201.  Next game went better, but near the middle, I caught some track burn which game me a few two pin spares.  Made them, and moved left 3 boards.  The next shot the burn seemed to have disappeared, and I left a 10 pin.  Got into the 10th frame working on a strike and left a flush 7 pin.  You know, great shot, and the headpin has to sweep by it just to add insult to injury.  I was an idiot and tried to hook it at the 7, I thought it was a good shot, but it caught oil and slid.  Lost a bracket because of it, 194.  Last game was just more nickel and dime stuff.  The guy on my pair wasn't being any more accurate than I was, but he shot 804 for the three game qualifying set.  One shot would hit 30 feet at the 8 board, the next would hit it at the 4 board, and then the one after that would be at 10.  He's a great bowler, and I'm not trying to take anything away from him, it's just that I was throwing good shots too, and all the little things just add up.  Now I'm beginning to hit my spares again, but that's all I'm getting.
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I know Kung Fu!

I am the one, the one that will bring balance.  All the pins shall be destroyed!

First, you always seem to have an exceuse for your bad result shots.

Second, Some bowlers just match up better to a condition when it comes to area and carry. They just have the right speed, turn, and tilt.

Third, maybe your not as good as you think you are.

What Sawbones said .

I think you are trying to bowl with your conscience mind too much instead of letting the subconscience take over for you.  In practise, you should train the subconscience with the conscience mind but in competition, you want to let the subconscience rule.  That's what you were training it for with all the practise.  When the conscience mind is controlling the body, everything is more tight, mechanical, instead of being more of a loose, relaxed, free-flowing result that occurs with the subconscience mind in control.

One other thing.

Consider, that "perfect" ball you're throwing might be hitting the pocket, but burning up. It would possibly explain the lack of mixers & leaving that 10.

Is it a long or a short sport pattern?

Also, have you considered throwing a pearl or sanded urethane for a game? Just to see if you get better action?