I added a Clip (50 fps) to the Editor timeline and trimmed it. After that I create a comp of it. When I Change the framerate in that comp or when I chosse "from Editor sequence" for properties when creating the comp it Shows different Content.
Looks like hitfilm does ignore the time I cut out (lets say fom 2nd second to 5th second) but on the Frame and then it leads to miscalulating of start and end Point when the framerate is different.
When I trim out a few seconds of a Clip and Change the framerate I except the Clip to always Show the part I cut out and not to Change that Content.