At&t appointment message won't confirm

As image to the right shows:
'AT&T Free Msg: Reply with the word "CONFIRM" to verify your -Uverse install appt. Out tech will...'
I thought it was strange because they told me that a Tech wouldn't need to show up, regardless, I kept getting a response back saying that it didn't recognize my response.

Reply with 'YES' not 'CONFIRM'

After realizing that 'Confirm' wasn't the correct answer, I tried 'yes' and it worked.

Why won't it work with 'CONFIRM'?

Purely speculating, they probably had a 'yes/no' response before but realized they didn't want people canceling appointments via text message (would be too easy for the user or technical problems with canceling appointments via text). So they had the message changed but didn't change the code that accepts your response.

Will this get fixed?

I'm not affiliated with AT&T in anyway, so I'm just speculating: a simple bug like this may have already been fixed. Also, there's the possibility that due to how big AT&T is: complaints that their 'verify appointment texts' don't work correctly never make it to the people that can do something about it. EG you tell a rep "hey, that text thing don't work right" and they respond "oh ok" and that's where the message ends as they assume its something that someone else will report and its not their job to fix that system.