I need information on Amorphophallus Paeonifolius -any experts out there?

This is my first year of growing them and mine have not shown any signs of going dormant and we may get our first frost in a week. I was wondering if I should bring them indoors or let the frost get them.
 
Second question, I had someone tell me that there is 2 different paeonifolius plants. A small variety 3-4 feet and a large variety that gets 9 feet tall, does this sound right? I have searched to no end and found nothing about 2 different ones.
 
Third question: I bought 3 bulbs last year as a new variety of amorphophallus  stated to be sp. madagascar.  No pics of the plant were avalible or size etc. just sold as new discovery from madagascar and 3 bulbs cost me 100.00. The plants were funny looking very small plants even on the largest bulb 14oz only put up a foot tall plant. No blooms. Have I been taken? I cannot find the seller again and they would not answer emails after I bought them. Bought off ebay :(.
 
 
Thanks anyone for any help on this. Ty 

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