I've also gotten the same results from acuminata phyllodes in the past. a/b extraction with shellite yields brown/orange goo that smells like dmt but doesn't combust (can't smoke it) and doesn't give a high. it's likely a problem with the solvent. should probably use something other than bunnings Shellite to be honest
How are you smoking it @makkapakka? Surprising it doesn't combust as you say.