The Music Tracks that plays in Lavastorm and Nektulos are not classic
 

The Music Tracks that play in Lavastorm Mountains and Nektulos Forest were added after the p99 timeline. Some time during/after PoP. These songs were created by Paul Romero and Rob King, who never made music for EQ until PoP and onward.
Edit: I deleted the Nektulos.EMT and Lavastorm.EMT files from my p99 install and the 2 classic soundtracks for nektulos and lavastorm played in place of the non classic ones.