blender renders wrong portions of video strips Here is the situation
I loaded several video files, edited the strips, did some cuttings, and made a sequence that I'd like to get rendered, added some audio files, did same kind of work on them.

But here is the thing, after I render this sequence, in the resulting file I get portions of video fragments that I cutted out while editing, And I don't see them in video view in blender.

What can be the reason for that?

blend file
That's most likely a problem due to a broken Video file. The internally used ffmpeg libraries don't work too well with some video formats and are not able to always provide the frames without artifacts and in the right order one by one. I bet your Screencast software didn't do a good job in encoding your footage.

So try to repair your footage. And then instead of using RecordMyDesktop to capture your screen you should use Open Broadcaster Software recording to file, not LiveStream. It should provide you with non-problematic footage that you can use with Blender without problems.