Why do you want to make lots 1 and 2 one lot? It’s unlikely thst your share of the expenses will change.
If you ever sell your two lots, the seller gets two titles.
Its not unusual for a single property to have two titles. Many older buildings have one title for the living areas, and separate title for the garage.
If you ever want to sell it as two separate properties, you don’t have to go through an expensive and complex process to unwind.