I have a bit of a problem with adding a drum track to an existing score: erratic tempo changes. The work speeds up, slows down, seemingly randomly. I don't have any tempo changes MARKED in the score except the initial tempo. In neither the original score nor the drum track can I see anything that would change the tempo. Am wondering if some sort of midi instruction is embedded in the drum track (the original score was made from scratch, no importing of a midi file).
Windows 10, i7, 8 gig RAM, plenty of hard drive space; Finale Version 25 with the latest upgrade
Windows 10; 8 gig ram, Pentium i7 processor, > 100 gig free hard drive space
Finale 25, latest update