Limitation Act provisisons

In Part V (relating to immovable property) of the Schedule to the Limitation Act 1963, there is a limitation period of 12 years prescribed at entry no. 65 (for possession based on title) as well as at entry No. 67 (for landlord and tenant). My questions are the following: (a) The explanation under Entry 65 in the Schedule states: "Reversionary (other than a landlord)". What is the meaning of this clause and of excluding the landlord here? Is the exclusion made here because the landlord is covered directly under entry No. 65? (b) In case of a LEASED property located in Uttar Pradesh, whether item 67 or item 65 will be applicable for the purpose of limitation - since there could possibly be some technical differences between a lessor-lessee and landlord-tenant relationships? (c) In a case where the prescribed limitation period has expired for the lessor to claim repossession of property from the lessee, what are the options for the lessee (who already has held possession of property for several decades) to perfect his title through a proper title document?