Player-Filled Locator Maps have incorrect Data Value

A filled_map with a data value of 2 is a Filled Locator map. When I use:

/give @s filled_map 1 2

I get a Filled Locator Map.

HOWEVER

If a player has an Empty Locator Map and clicks “Create Map”, a Filled Locator Map with a data value of 0 is created, which shouldn’t even be a possible item, as it overlaps with a regular Filled Map.

Using:

/testfor @s[hasitem={item=filled_map,data=0}]

Will now return true for a regular Filled Map, as well as a Filled Locator Map if and only if it was created by a player.