when render distance is on 16 chunks only loads 8 chunks but fog is on 16 chunk

when the chunk settings are at 9 or more the chunks only load to the 8 chunk line but the fog goes to the where ever it is set. when i load the snapshot in a different world not generated in the snapshot it still does the same thing. but when i go in a released version of minecraft i can load on far so it is not my computer.