Thanks for the link, I had missed that bioassay. It does seem to indicate some tryptamine, maybe DMT, maybe something else, maybe a mix..
If the solvent is not fully saturated, it may never crash. You can try the typical tips as per our FAQ like evapping more and trying freezing again.
As for the last question, just re-xing doesnt mean you'll have DMT only.. There may be other alkaloids that are soluble in naphtha, which may be wanted or not.. You can do as you please of course but I personally recommend always finding out more about what you consume, for your own safety and knowledge. Im not aware of acacias containing toxic compounds, nen888 would be the person to ask, but either way if its not oit of your budget, I highly recommend buying several different reagents (for example marquis, mecke, liebermann, ehrlich), or also TLC if you want to go a bit further.
Good luck either way, and be sure to let us know the results.