Perhaps this might be the source of the mis information.

Confederate Brigadier General. An ardent secessionist, Gantt was a delegate to the Southern Rights Convention in 1850 in Nashville. He became active in Democratic politics in Arkansas and was elected to the First Confederate Congress in 1861. On July 29, 1861, he was elected colonel of the 12th Arkansas Infantry, which he helped raise. He was stationed near Columbus, Kentucky. On December 5, 1861, he took command of a brigade of two Arkansas regiments at Fort Thompson near New Madrid, Missouri. In early 1862, General P. G. T. Beauregard appointed Gantt an acting brigadier general.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=26836782

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Edward W. Gantt 12th Arkansas Infantry

Colonel Gantt, being exchanged, was in command of an
Arkansas brigade composed of his regiment and the
Eleventh Arkansas, at the surrender of Island No. 10
and New Madrid bend. Though the capitulation was
inevitable there were severe criticisms of Colonel
Gantt. He complained that a commission of brigadier-
general, which had been issued to him, was withheld.
Feeling aggrieved by this slight, which he regarded as
-unjust and instigated by personal hostility, he left the
Southern army and espoused the cause of the North,
going North and making speeches in favor of the Union.
http://www.civilwardata.com/active/hdsquery.dll?SoldierHistory?C&535766