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I'm experiencing the same issue, and no, there are no obvious toggles under the Settings menu, including Advanced Calling.
Trouble is, I have no idea whether this problem began happening after my OS upgrade to Advanced Calling, or if it was pre-existing. I'm not a big voicemail user, and much of mine goes to Google Voice or my work phone.
Waiting on Lollipop before I begin re-enabling my various Verizon apps, in search of a solution.