I am going to lean on the much much more likely NMT, which is common in DMT extracts. I don't know the method of analysis, but one of the more common methods is HPLC. A sample is dissolved into a solvent, injected into a column of media, and a solvent is continually pumped into the column. Different compounds move through the column of media at different rates. Sometimes, different compounds move through at the exact same rate and this is where misidentification can occur, even in professional analytical labs. NMT and AMT, being isomers (exact same chemical formula) could easily move through the column at a similar rate. Or close enough for an analytical chemist to assume that the NMT is AMT. I'm a chemist, but not super experienced with analytical, but I know this is possible and does happen sometimes.
AMT is pretty darn rare, and somewhat expensive. That said, I actually have been given a mixture of AMT and DMT (both freebase) for smoking. Kind of a weird mix because AMT lasts a lot longer. (I never actually tried the mix, it's still in the stash).
AMT on it's own is not my favorite psychedelic by any means but I wish it was a little bit more common. It was euphoric, then psychedelic, but the stimmy edge was not what I was looking for (at least at the time I tried it.)
If it's an extract, I can almost guarantee it's not AMT though, as that would have to be added into the DMT.
It actually was a pharmaceutical anti depressant in Russia though I think it didn't last too long.
