Odd, affected pronunciation of "realtor"

Solution 1:

The National Association of Realtors, who own the trademark on the word Realtor, have severe paranoia about their trademark—I would call it “trademark anxiety”. They always put that registered trademark symbol next to the word "Realtor". Like, even if it appears 100 times on a page, every instance has it with the ®. And it's always in all caps. Look at Realtor.com, or as they call it, "REALTOR.com".

In any case, nobody actually says "real-TORE" like they do in the ads. It's just another way for them to assert their ownership over the trademark, by attempting to control how it is pronounced. This is similar to stunts pulled by the people at the Lego company, who put up a page once telling people not to use the word "Legos". I wrote an answer about this before.

Solution 2:

Merriam-Webster lists it as an alternative pronunciation:

\ˈrē(-ə)l-tər, -ˌtȯr, ÷ˈrē-lə-tər also rē-ˈal-tər\