TD website says so, but you're just fine ordering 2 as per 4myrebate.com webpage. So, 2 should be just fine.
Yeah, that TD wording seems like part of their "rebate on this item" boilerplate template. The PDF clearly says 2 per offer for these, so save a copy of the PDF if you are worried. Two of each plus the toaster and iron push the total nicely over $50 for free shipping. Add in a cashback site and maybe a Discover Card bonus if you haven't maxed that out yet, and they will pay you a bit to try and/or donate these... unless you are paying crazy CA sales tax or something.