Alan from ecotree.net posted something on his FB page about a Chinese company selling fake Spiral Aloes...he says they even stole a picture of his propagation area off his website and used it one theirs!!! I will see if I can get the name of the company from him.
If your spiral aloes are killed in cold temps, they may not be true Aloe polyphylla....as aloe polyphylla in habitat endures very cold temps in the winter.
I don't know!!! I have sent the guy Alan an email with the info from this post asking for his opinion on all this. Keep you posted!