Lua, problem with tables

-- when you save a table in a variable, then not the values of the table get saved, only the reference to the table, meaning one write will affect the other when they have the same reference

-- example
inner = {1,2,3}
t = {inner,inner}
t[1][2] = 123
print(t[2][2]) -- prints 123

--[[
most likely your
NPCPreviewTable[1][2]
is the same table as
NPCPreviewTable[2][2]
--]]