Squad Editor only rendering 2 of 150 frames

I’m using Squad Editor and have a scene set up in my sequencer. Once I finished setting up the scene, I rendered it as an .avi. I played it back and it looked great, but I wanted to make some adjustements.

I didn’t change any settings, only a few things in the scene (added particle effects, etc). But I tried rendering again and it seems like it only captured 2 of 150 frames. Any help is greatly appreciated!