If the alignment won't "keep" then its most likely a hardware problem. It's not software, and there's nothing else short of getting the screen replaced that will fix a bad touch sensor.

I didn't mention That i've replaced my Screen bundle yet (the touch screen sensor and the LCD) with second screen bundle ...now only the engine i havn't replace yet....now trying to go back to verizonguy rom....hopefully it works..
Thanks Schettj
Waiting some more suggestion......it's just me or...some one else with me??????????????????????????

Guys I tried psiphi's solution and it works!! Thanks psiphi! MY ppc6700 was always going out of alignment especially on the right side so I cleaned the right side with a thin sheet of paper under the plastic. A good explanation for that maybe that, if dirt gets stuck in there, it will force your screen downward at the right side and the actual contact of the screen will take place at an offset position rather than the intended position.

Thanks you all guys
Now my alignment goes well..
So far i conclude that the buildup under the front case was the source of the miss alignment issue.
Once again Thanks
PROBLEM SOLVED

That worked for me too. No more issues. I folded the paper into a point and cleaned the corners which completely eliminated my problem.

Re: (WTA)XV6700 screen alignment always change
 

Nice work FastRX8. After I replaced touchscreen on Xda 2 I had serious problems with screen alignment. I downloaded Resco registry editor and followed your instructions and it fixed this serious glitch. Many thanks.=D>

Re: (WTA)XV6700 screen alignment always change
 

Sometimes screen protectors that are placed under the plastic may cause this issue. it did me. So using Fellows WriteRight screen protectors I made it a hair smaller than the screen and it works perfectly.