This is interesting. I think the reason for few submissions was simply that there was never anything really on the program, and if there was, it was analytic philosophers on Heidegger.
Janice Dowell, program committee chair for the 2015 Central Division meeting of the APA, says that the committee would like to especially encourage submissions in continental philosophy. She writes, “Continental philosophy is often underrepresented on our submitted program and one source of the difficulty seems to be that we receive so few submissions in that area.” The meeting is February 18-21, 2015 in St. Louis. Submission instructions are here.