Mixer soundfont issue with cellos and contrabass

I'm working on a transcription of Wrath of the Reset Bomb from Kid Icarus (W.I.P on my profile), and in a certain measure near the end it calls for a gong. I went searching and downloaded the Gong soundfont to use for the mixer because musescore doesn't have an acceptable gong sound, and so I installed it, not knowing that it would change every instrument voice to the gong sound. I managed to get most of the sounds back to their correct instruments, except the cellos and contrabasses; I can't find their correct sounds. I know I can assign it to Cello and Contrabass but when I do it doesn't sound as full as it did before I installed the gong soundfont, as right now it sounds dry. I'm also just discovering that when I make a new score, every voice for the orchestra instruments are set to gong automatically. In short:
1) what is the original sound of the cellos and contrabasses in the mixer by default so I can reset it,
2) how can I fix the mixer issue so that when I start a new score it doesn't set every voice to gong?

Sorry for a long read but I'd appreciate the help.