Thank you for sharing the video. If you move either the stop-loss line or the entry line while holding the Shift key, you should notice the behavior demonstrated in the video. The distance between the entry and stop price should be maintained and reapplied to the new price level.
We use the Shift key for this operation, so it's possible that your keyboard may have been accidentally using Caps Lock the whole time. Could you please check if this is the case?
If you need further help, let me know.