new-added detect silence scenes mode 2 always create segments twice

[GRFTSOL]

The fewer issues I have to read, the more new features I will have time to implement, so I ask that you please try these things first

• Try with the newest version from GitHub (also it might have already been fixed in latest nightly build)
• Read the documentation and FAQ, Known issues, Troubleshooting
• Search for your problem under Issues or Discussions
• This problem happens with all kinds of files that I try. For problem only with a particular file or type, use this other form instead

Operating System

Windows 10

Steps to reproduce

1. import video file
2. tools->detect silence scenes
3. change detect mode from "1" to "2"
4. confirm

Video

20241103134717.mp4

Expected behavior

each segment are created twice

Actual behavior

each segment should only be created one time

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