Frames were sampled.

The main timeline has 318 frames. 24 evenly spaced frames spanning the whole timeline were rendered instead of every frame.
Files are numbered by their position in the sampled sequence, not by their original frame number.

Rendered at 0.5x scale.
Raise -Ddecompiler.swf.maxMainFrames and -Ddecompiler.swf.frameZoom to export more.