Mute not working in chat and commands

I am unable to get the mute button to clear off my screen even when I turn mute on. 

I am running this script in command blocks. I know this will cause a continuation of this script but I figured that the mute button would turn it off.

Below is the scripted I am running on the command blocks

Command Block 1

Set on Repeat, Unconditional, Always Active

/testfor @p[name="Player name"] 

Command Block 2

Set on Repeat, Unconditional, Needs Redstone

/testfor @p[name="Player name"] 

Command Block 3 

Set on Impluse, Unconditional, Needs Redstone

/scoreboard players add @p[name="Player name"] a 1

*a is the command I added for /scoreboard add before setting up the command blocks

I know that the Always active on the command blocks is causing my issue of the chat continuously running, but in all the other videos I have seen this isn't the case when they set up a similar command. My chat and command mute button will not work.