Probably too late, but depending on how much it costs to ship it overnight, I'd go for overnight/next-day shipping--that way, if it is indeed a mistake maybe it'll get shipped out right away (since you requested overnight shipping) before they catch it.
In any case--FWIW their site appears to be having issues at the moment of this post since I can't even connect to their home page...
Well got a confirmation from DDD at the $7.28 price.This morning received another email stating order was cancelled.No exact reason given.Must have been a mistake all along.Also ordered from FYE and that was cancelled due to a pricing error.