Misnamed plains temple structures

Plains temples have numbers 3 and 4 instead of 1 and 2.

How to reproduce

1. /give yourself a structure block
2. Set it into LOAD mode
3. Type in: village/plains/houses/plains_temple_1 or 2
   → Read the message down below (It doesn't work)
4. Change the title to village/plains/houses/plains_temple 3 or 4
   → Read the message down below (It works)

So, there are temples 3 and 4. Either the 1 and 2 are unused and don't work, even in structure block or it is a typo.