In that case, if it is like this at the inside house switch
you must:
Move cable 3 blue to left switch L1
Move cable 3 brown to right switch com
Keep link from left com to right L2
Then inside garage switch reconnect (edit) cable 3 blue to N loop with blue and black.
you must:
Move cable 3 blue to left switch L1
Move cable 3 brown to right switch com
Keep link from left com to right L2
Then inside garage switch reconnect (edit) cable 3 blue to N loop with blue and black.