Sony has it for $6.99 (ePub, just like Kobo / will work on the Kobo). They list two editions at that price and in the past when they've done that one was the US version and one Canadian but I'm not sure how to check that. It's weird, but B&N lists it twice too for $6.99 (Kindle version is $6.99 for the US too).
Something does seem messed up at Kobo. When I search I find the book twice, once for $14.49 and once at $18.99
Perhaps email Kobo CS and inquire? They're database does seem to update slowly or on a delayed basis to everyone else.