1) The first one is remedied by setting also completely setting its movement speed to 0 and minimum speed to 0 as well. Set the turn rate to .10 and the unit should be like a ward
2) Make sure you set the forces, which usually locks it, and then you lock the settings so that they are set and cannot be changed in-game
3) Look above. If you mean like AoS maps where there is a set team color, that's probably done by setting the forces right
Anwser to #3: In the player properties where you set the player to computer click the fixed starting location checkboxes to the right for every person, that will lock the colors.
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#7
#2 is strange and ive experienced that bug too, and the only way to fix it in my experience, is too make sure the computer player owns something. Its weird but it worked for me. If this doesnt work then maybe you should just set it to user, then set it back.