Why can't I select certain features for Brave 7 LE?

For this camera, some functions cannot be used at the same time. Please refer to the information below.
Image stabilisation not available for 1080P120fps, 720P240fps, 720P120fps, nor working with distortion correction；
Slow Motion and Auto Low Light not available for 4K30fps, 2.7K30fps, 1080P30fps ;
Diving mode and White balance not available for "Effect"