The Internet's Finest Tropical Fruit Discussion Forum!"All discussion content within the forum reflects the views of the individual participants and does not necessarily represent the views held by the Tropical Fruit Forum as an organization."
with updated picture it looks like a kumquat, nagami type or hybrid?When I have seen this type of cupping it seemed to be caused by the tree becoming too dry at some point and beginning to shrivel. Even after proper watering the curled leaves never returned to normal, but new leaves grew fine.
Its not an avocado, i bet my ass on that ! Def a citrus of some sort.