Likewise. I had one game where I had a 256 block and two 128 blocks, but I ran out of room to maneuver before I could combine the 128s to another 256 and then combine the 256s to a 512.
Also about your autoit "analysis" 36 + 150 + 13 != 162
Anyway managed to get to 1024 + 512 + 256 after that without random button mashing.