Inconsistent - A var for Fuel Tanks numbering

Why is the tank numbering inconsistent? Or is it an SDK error. Brings up my
point about project compiling and error reporting. Missing a 1 on first tank?
FUEL TANK CENTER CAPACITY | Maximum capacity in volume of the 1st center
tank. |
Gallons
|
—|—|—|—
FUEL TANK CENTER LEVEL | Percent of maximum capacity of the 1st center tank.
| Percent Over
100

|
FUEL TANK CENTER QUANTITY | Current quantity in volume of the 1st center
tank. |
Gallons
|
FUEL TANK CENTER2 CAPACITY | Maximum capacity in volume of the 2nd center
tank. |
Gallons
|
FUEL TANK CENTER2 LEVEL | Percent of maximum capacity of the 2nd center
tank. | Percent Over
100

|
FUEL TANK CENTER2 QUANTITY | Current quantity in volume of the 2nd center
tank. |
Gallons

Never mind - forgot this was legacy Fuel.