Curious about voicemail

[DexterDawg]

When I get a voicemail it overides all other notifications, and dismiss doesn't work to clear, it shrinks down, but if I want to see the missed call notification or an email notification I either have to listen to the voicemail or clear it from phone settings. I use threaded SMS and that's the option that gets replaced when I hit dismiss. Also the "listen" button doesn't do anything when I push it. I have to hold the number 1 down to get my voicemails. I'm mainly wondering if this is others experience or if I have an issue. I don't use phone alarm and I can't think of anything else that could be interfering with VM. Thanks to anyone who responds.