Do all two bedroom units in the Maui...

Do all two bedroom units in the Maui Ocean Club have lock-off capability?

Not all two bedrooms have lock-off capability.

Yes all 2BDRM units that aren't part of a 3BDRM unit do lock-off.

Does the old Lahaina Tower only have one bedroom?

Not all 2 bdrms have lockoff capability. They all have an interior privacy door that seperates them from the living room but not all have an exterior entry door that makes them a lock-off unit, some do.