As far as I'm aware, that's how the markers are designed.
They're accurately called "timeline" markers because they are referenced to the absolute track position and are independent of all content.
You can see how that would be very helpful if you need a scene to always start or stop at a specific time in the finished product, but that doesn't address your need for markers that track with the content.
Believe it or not, chapter markers are fixed to the timeline too, so they aren't any help in your situations either.
One thing I could suggest is to add a track above your current Track 1 and place a color board or similarly obvious clip there that's aligned with the content you want to keep track of. You could uncheck the track's Enable box so nothing would get through to your finished video.
You can access pre-made color boards from the media library. Just click on the drop down list that says Media Content and select Color Boards.
I hope this helps!
YouTube/optodata
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