Here is another example of a # where your system is adding extra beeps when trying to navigate their voicemail, which does not happen when using an actual phone:
(858) 578-7343
This is a grocery store #, and after they play the recorded message, they want you to press 0 to get to a human being for assistance. Every time I do this, I hear the tone for 0, and then a second later a second tone is generated, causing the system to say that my entry was incorrect. This occurs even when I roll the cursor completely away from the # pad.