The total number of colonies planned for the west were:
1. Charlotina (all land north and west of the Wabash River), Transylvania (western Kentucky)
2. Vandalia (West Virginia and east Kentucky)
3. Two attempts to settle an Ohio River colony west of Pennsylvania and east of Charlotina (the 'New Wales' fiasco of 1763, Ebenezer Hazard's scheme some years later, re-attempted by his son in 1774)
4. Apparently Montfort Browne tried to settle a colony on the Mississippi (as far as I can tell, NOT West Florida).
5.The Watauga Association also tried to become an independent colony.
Very fun and interesting note: give Charlotina, Transylvania, and Vandalia their proposed borders (and maps and descriptions exist to detail this), and given the 'New Wales' scheme had proposed longitude and latitude boundaries that are
(very surprisingly roughly equal to the natural boundaries of the so-far unclaimed land between Pennsylvania and Charlotina, all the land above the Ohio River is
perfectly divided between these western colonies!
If Watauga takes all of North Carolina's trans-Appalachian claims (as it did when North Carolina reformed it into its Washington County in 1776) and give British 'Mississippi' the rest of the land between that, Georgia, and West Florida the land south of the Ohio River is, too.
Freaky!
I can give links proving this if anyone needs it.