why is it that on some records, sound terrible??

well this is the problem, I just bought the new GNR album on vinyl and as the record played the sound got worse. BUT where i am confused is if i bought on a nat king cole record it plays very nice all the way through.

now with that said i am in the process of doing re-set up the TT because i haven't touched it in about 2 and years, adjusted the VTA and the Tracking Force.

I am going to run a quick comparison and i will report back soon.

Thanks for your help

YES after playing one of the records over again and keeping the stylus nice and clean, the record sounded stable (better).