Harry Truman reverse proof.

Hi I tried to add the 2015 P Harry Truman reverse proof coin (mintage 17,000) but it would not allow me. The Eisenhower was all ready added. And I was able to add the JFK via the modify option. However, it said this was not possible to do for the Truman reverse proof coin and to add topic to forum. If anyone knows what to do from here thank you.

Please add a link to the coin(s) in question, so we can get a better idea what you're talking about.