SC2Mapster

What steps may reproduce the problem?
1. YABOT Metalopolis Demo mode
2. Zerg 7 Roach Rush build order
3. (I've watched Medium, Hard,  V Hard & Insane all fail to perform the extractor trick)

What is the expected output? What do you see instead?
Expected: Build first extractor, queue drone, cancel extractor (extractor oversupply trick)
Actual: ends up building two/three extractors

What version of the product are you using?
1.4.3

Do you have an error log of what happened?
negative

Please provide any additional information below.
Initially discovered this when I set the AI to roach rush me and it rocked up with standard 'lings and a couple of roaches.
Then set about watching it in Demo mode at different AI levels and using the built in 7RR and also the single player custom YABOT encoding I generated using SCFusion:
100 [i] 7 Roach Rush | 11 | SCBuildOrder | 7 Roaches @ 4:34 [/i] [s] 10 200 0 66 1 0 41 0 | 10 100 0 90 1 1 31 0 | 10 75 0 101 1 0 35 1 | 12 65 0 115 1 0 35 0 | 11 150 0 131 1 0 40 0 | 12 100 19 164 1 1 31 0 | 12 141 61 186 1 1 33 0 | 14 75 39 188 1 1 33 0 | 16 75 36 199 1 1 33 0 | 18 75 34 211 1 1 33 0 | 20 75 31 223 1 1 33 0 | 22 75 28 235 1 1 33 0 | 24 75 26 247 1 1 33 0  [/s]
Note the third command, 10 75 0 101 1 0 35 1, ends with the cancel flag.
Does the Green Tea AI acknowledge the cancel flag?
Is the extractor trick to complex to encode for YABOT considering drone commands are not included?