Your casts are occurring at the following times:
Code:
00:00.531: Fire Elemental Totem
02:41.063: Earth Elemental Totem (160.532s after previous Elemental)
03:40.500: Fire Elemental Totem (59.437s after previous Elemental)
07:07.478: Fire Elemental Totem (206.978s after previous Elemental)
10:26.779: Fire Elemental Totem (199.301s after previous Elemental)
11:29.127: Earth Elemental Totem (62.348s after previous Elemental)
Your second Fire Elemental, cast at 3:40.500, is overlapping by a half-second with your Earth Elemental. In the event of a pet totem collision, the game despawns both pets. Despite the shared lockout between Earth Elemental Totem and Fire Elemental Totem, there are certain circumstances where you can pop a new pet totem while there is still a pet up.
You can change your Fire Elemental Totem button to a macro:
Code:
/cast [nopet] Fire Elemental Totem