Michael - from what you describe, it sounds like a misaligned dash Oval. The HARD PLASTIC instrument Oval is held in place by 3 scews above the tach/speedo gauges - 2 small screws on the bottom on either side of the steering column, and then 3 screws accessible on either end of the centre vent.
There are no "clips" holding the top of the oval to the dash - its a fairly snug fit with a rubber gasket around the HP Oval to close any gaps.
If I were in your shoes, I'd just remove the oval and take a look - it's easy to do - and you don't need to remove the steering wheel like many people say - just a little squeezing and rotating and the HP Oval will come out after removing all the aforenoted screws. The HP Oval may just be misaligned. There are plenty of these on eBay for $10-20 if you do have a problem with it. if it is the soft DASHTOP that is warping - look for the cause - excessive heat, etc.
I certainly would not glue the HP Oval to the dashtop - you must be able to remove that oval to get to the panel lighting etc. If the dashtop is warping, call the mobile repair service to see if they can straighten it out.
BTW, there is a little trick to remember to make sure the Trip odometer works when putting it all back together - just make sure the "press to reset" button is lined up with the little switch that is clipped to the dashboard.