> Not sure what the quality of your turntable was Mr Dabbs but ...
Some cheap turntables had a flaw that the arm was pulling _way_ to strong to the center. Users thought it would be normal because they did not know better. Hence the pennies.
The quality of the vinyl pressings also varied a lot. Some companies reliably produced top quality, others reliably crap.
At some time vinyls appeared that were so thin/floppy that even when you held them correctly (both sides, two hands) they would sag so much it was difficult to place them on the turntable. Funny enough some of those actually had decent audio quality. Unsurprisingly they tended to get distorted when stored without due care.
Friend of mine tried to flatten such a distorted a vinyl with a smoothing iron. The result was pretty hilarious. ---->