Looking for some help with a plugin

Hi guys,

I was wondering if someone might be able to help me with a wordpress plugin, its not a WPMU DEV one - hope that's ok.

I use Download Manager Pro on my membership site (I run this alongside Protected Content to limit the amount of daily downloads members can have). In the settings I have it so that every 0.5 days (12 hours) a subscriber can download 3 items. However, one of my members can't seem to access the downloads and it just keeps saying 'download limit exceeded' even though she hasn't downloaded anything. This isn't happening on other subscribers accounts. Any idea why this might be happening?

I'd appreciate any advice or help with this.

Thanks so much,
Louise