What is the source that you are using for the information? It is always helpful to list sourcing for further research.
According to Wright's The Continental Army, there were originally fifteen Continental regiments raised by Virginia, numbered 1-15. After consolidations in May 1779 there were eleven remaining. Of those 10 were captured at Charleston.
-The 1st Virginia was consolidated with the 9th Virginia Regiment on 12 May 1779 and the unit was designated the 1st Virginia Regiment. It was captured at Charleston.
-The 2d Virginia Regiment was consolidated with the 6th Virginia Regiment on 12 May 1779 and was designated the 2d Virginia Regiment. It was captured at Charleston.
-The 3d Virginia Regiment was consolidated with the 5th Virginia Regiment on 12 May 1779 and was designated the 3d Virginia Regiment. It was captured at Charleston.
-The 4th Virginia Regiment was consolidated with the 8th Virginia Regiment on 12 May 1779 and was designated the 4th Virginia Regiment. It was captured at Charleston.
-The 7th Virginia Regiment was redesignated the 5th Virginia Regiment on 12 May 1779 and was captured at Charleston.
-The 10th Virginia Regiment was redesignated as the 6th Virginia Regiment on 12 May 1779 and was captured at Charleston.
-The 11th Virginia Regiment was redesignated on 12 May 1779 as the 7th Virginia Regiment and was captured at Charleston.
-The 12th Virginia Regiment was redesignated on 12 May 1779 as the 8th Virginia Regiment and was captured at Charleston.
-The 13th Virginia was reorganized and redesignated at the 9th Virginia Regiment on 12 May 1779. It was assigned to the Western Department on 24 May 1778 and was redesignated as the 7th Virginia Regiment on 1 January 1781.
-The 14th Virginia Regiment was reorganized and redesignated as the 10th Virginia Regiment on 12 May 1779 and was captured at Charleston.
-The 15th Virginia Regiment was reorganized as the 11th Virginia Regiment on 12 May 1779 and was captured at Charleston.
Beck's volume (Encyclopedia of Continental Army Units) lists nine regiments captured at Charleston: the 1st, 2d, 3d, 4th, 5th, 6th, 7th, 8th, 10th, 11th. He also states that the 9th Virginia alone escaped being surrendered.
What might be somewhat confusing is the reorganizations/consolidations/renumbering of regimenets in 1779 and what happened during the siege itself. The bottom line is that nearly the entire Virginia Continental line was lost and was not reconstituted. The 1st and 2d Virginia Continental Regiments that served with Greene in 1781 were new units. The sources that refer to them as the 4th and 5th Virginia are wrong. (see Babits and Howard-Long, Obstinate, and Bloody.)
Further, 'Apparently early in the year 11780, if not sooner, the enlisted men of the depleted 5th, 6th, 7th, 8th, 10th, and 11th Virginia Regiments were gathered together and formed into two temporary detachments of battalion size. The officers of the 4th through 8th and the 10th and 11th Virginia Virginia Regiments took turns commanding them. The two detachments and all the officers were subsequently captured at Charleston on May 12, 1780. The 1st and 2d Virginia Detachments seem to have considerable precedent in Virginia. Virginia had an elaborate recruiting system that utilized militia officers to gather recruits to send to the Continental Army and in times of emergency it appears that temporary, but numbered, units were formed from the available companies of Continental recruits for the Continental regiments and from companies of militia.'-131.
Further, in A Gallant Defense: The Siege of Charleston by Carl Borick the order of battle on page lists the 1st, 2d, and 3d Virginia Continental Regiments as well as Heth's Virginia Detachment and Parker's Virginia Detachment which were made up of elements of the reorganized regiments from 1779 and 1780.
That isn't five Virginia Regiments, but three regiments and the consolidation of at least five other regiments of the Virginia Line. So, the listing in Wright is correct that the ten Virginia Continental regiments were lost at Charleston, three of which fought as complete units and the others were consolidated into two detachments. Berg shows this in his volume quite well.