Mystery regiments of 1662

In Dalton's English Army Lists and Commission Register one will find several regiments raised in 1662 that have no clear context that justifies their formation. Also the dates of disbandment or disembodiment is unclear. This unlike the regiments raised for the Second and Third Anglo - Dutch Wars in 1667 and 1672/73, respectively.

The regiments were formed on 1 September 1662, and there seemed to be three regiments of horse, and two of foot. In the Calendar of State Papers Domestic a little is found, most notably the commissions to the five colonels in September 1662. The foot seem to disappear, but for the horse some bits are found during 1666.

Earl of Cleveland's Regiment of Horse
Cleveland got colonelcy of an old Parliamentary regiment of foot in 1660 during the restoration.

Earl of Lindsey's Regiment of Horse

Earl of Northampton's Regiment of Horse
Like Cleveland, Northampton gained the colonelcy of a Parliamentary regiment of foot in 1660.

Earl of Craven's Regiment of Foot
Commanded at the same time an English regiment in Dutch service. In 1670 Craven would assume command of the Coldstream Regiment of Foot Guards.

Sir William Killigrew's Regiment of Foot
Commanded at the same time an English regiment in Dutch service. In 1664 Killigrew would be colonel of the first marine regiment in the British Army.

To the author some questions come to mind:

1. To what reason were these regiment levied? The Restoration period is not characterized by deliberate raising of regiments, unless there was a war.
2. May the raising of these regiment relate to suspected uprisings, like the Venner riots in early 1661?
3. Are things being overlooked, and are these regiments simply regiments of militia?

The authors looks forward any discussion related to these regiments.