I choose the scale or rotate option that's on top of the render timeline, but every time I left click, the red circle with the 4 black lines sticking out (3D cursor) is selected, and not the scaling or rotating options. Is there any way I can fix this?
EDIT: I have posted this on blender as a bug. Can someone who has enough reputation close this question as not constructive (ie this question is something that needs to be discussed not answered)? Thank you for all your help.
EDIT 2: This is my computer specific, please check my solution below.