Hi George,
I spoke at that convention as well with my friend Deveraux.
We are both in the talking stages of doing the definitive book on the First National flag for its many variations are simply fascinating and show how people thought in the tail-end of Jacksonian America.
The 14th and 15th stars represented Maryland and Delaware.
There is a 17 star FN flag in California with those two stars representing New Mexico Territory and Southern California, both pro-South.
Greg Biggs