Incomplete commands targeting multiple entities display the usage more than several times

If you don't do a command completely that has more than one entity targeted, it will show the usage multiple times.

/tellraw @e[c=2]

Assuming there are at least two entities in the world, you will see this in chat:

Usage: /tellraw <player> <raw json message>
Usage: /tellraw <player> <raw json message>

even though only one command was executed.