Since getting my iPhone 4 I have been experiencing some strange things with visual voicemail. When people leave me a voicemail it appears on my phone as normal. However a day (sometimes longer) later my iPhone will notify me that I have a new voicemail and it will be a duplicate of the last voicemail. It will have its own entry in the visual voicemail list yet the audio is identical. Has anyone else noticed this problem or know of a way to solve it? All the double entries in those images are the exact same audio message. Appreciate any help anyone can give.