Adding useless commands

I seem to have added commands. They do nothing, but they seem to have been written into the game. I restarted the game and my computer, but they still exist. I found this accidentally by hitting one of macro keys on my key board. The macro key types in the command "/gamemode 0 (and then hits enter)".

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To reproduce this bug :
1 : enter following command
/gamerule domobloot/gamemode 0
(ENTER)

2 : if you then type
/gamerule domobl
(DON'T HIT ENTER)

3 : and then TAB through available commands, you should have the command that you typed on step one.

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i tested the idea again to see if its consistent, which can be seen in the picture. 2 extra commands are in the list that shows available commands. (at far bottom)
"domobloot/gamemode"
and
"domobloot/say"

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how do i get rid of this, or could you guys fix it in the next update?

thanks!
~Tntexplosionboy