No. The TCM Shop has "Exclusive!" at the end of each title. They only put that on their TCM/Universal titles (and that very short-lived Westchester films DVD-r line), which aren't sold in general retail. You're right in being a bit suspicious, though. These are both movies that were made...
These are listed on the TCM Exclusive website, so they are part of the TCM/Universal releases. For some reason, despite clearly being a double feature of Nelson Eddy and Jeanette MacDonald films, there is no 2 disc set with both of these titles. Hopefully, it will be updated on TCM.com later...