Strange voicemail sms notification problem


Being an O2 user my voicemail number is 901. At some point I was asked to store this in my phone under settings > call > voicemail settings.

Since then I have been getting random Handcent notifications in my status bar even though I don't have an new/saved/archived voicemail using the 901 service. When the status bar is pulled down to be viewed the "sms" is blank as well. The texts also never show up in the actual Handcent app.

I was wondering if anyone has heard/had a similar problem.

TLDR - Getting random empty sms notifications from voicemail number even though don't have any new voicemails.