It seems ludicrous or at least very short-sighted that the cover positions for blinds encompass only half of the possibilities for position, i.e. fully open is 100, fully closed is 0, but fully closed does not specify whether it is closed up or closed down. It should work that 0 is closed down, 50 is fully open, and 100 is closed up. This has become even more important with the implementation of SwitchBot blind tilt motors which operate exactly in this fashion.
Closing as a duplicate of this:
Please vote and comment there.