One of the Barren Co. ALLENs of this time was my GGG GF, John ALLEN. According to research done by my aunt, he was born in VA (county not known to me) in 1765 or 1775. On 2 Jul 1800, he married Amy PERKINS in Barren Co. KY. He is said to have died in Barren Co. in 1830. His son William (1802-1845) m. Adaline WRIGHT in 1824. Some of William and Adaline's children moved to Texas. Among them was the Rev. William Allen (1834-1908) who served in the state senate from the area north of Dallas.
Despite the variations in data, I think my GGG GF may be the John ALLEN in your post who m. "Annie" Perkins and d. in 1814.
Please feel free to email me directly. I would be happy to compare notes with you and see if we can resolve what appear to be inconsistencies.