In fairness to Jet, I think it is only the 1015VS that has had the problem. Other models seem fine as far as I'm aware. I know that Petrol Pete bought a Jet 1221VS at a similar time to my Jet purchase, and he has been extremely pleased with his choice.
My universal complaint with all these small lathes though, seemingly irrespective of the make, is the horrible tools rests they supply with them. Why is it that manufacturers think that a 6 inch tool rest which is rough cast exactly where you put your index finger, is a suitable inclusion? The roughness is a deliberate feature which serves only to make your finger sore after 3 or 4 hours of parallel turning, and it wouldn't cost any more or less to cast it smooth. Nor would it cost a great deal more to make it 9 inches long, which might then be useful to anyone who wants to turn the full length of a pen mandrel. I know the answer to the second question - so we all go out a buy a longer tool rest, but even then, they are either round or still rough. Come on lathe manufacturers and accessory manufacturers. Start designing your tools rests for woodturners, not for accountants.