Instead of forcing yourself to play a certain line (which can cause tension and worsen the situation...) you could also try to change the release when everything else is and feels fine. Extending the skid phase and slightly delaying the breakpoint can do the trick effectively - I tend to suffer from the contrast of your situation, because I shy away from playing ever deeper once the THS really opens up. I keep my line too tight, by tendency, but over/under is also an issue once the mid lane area fades away. Therefore, I slightly uncup my wrist and/or add some axis tilt, which pushes the ball further down the lane but does not make it hook more/earlier. Sometimes only subtle changes do the trick, but I find this option easier to control than making bigger movements on the approach (which can, ultimately, be the better solution, though. It always depends on what the lane yields and how the feeling is).

DizzyFugu - Reporting from Germany
2010/11 Benrather BC Club Champion
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I do not care about my break point.  The system I use is a 3 point targeting system and I adjust off of reaction as opposed to break point.  Right now I am bowling on a 39 foot house pattern(hate house shots)  The sweet spot is the 8 board at 39 feet.  I know my lateral movement and adjust from there.  If I hit the 8 board and make the proper first adjustment I am locked in.  I can hit the 8 board at 39 feet over 90% of the time.  The rest is proper entry angle.

 

Smash49