Yeah - I find that I just lose focus. I don't get to practice much, so I turn up on the range and work on something like posture for a hour or so... then figure out that I need something to go to on the course, so, I end up butchering something to make it go in the right direction-ish.
To be honest mate - I just need more time and less work / family to get better. It has taken 3 months just to get myself to stand up a little straighter.
Tis bloody anoying.