Need advise with worksheet design/advanced filter

We distribute a local magazine and I store all data associated with it: product name (how many months?), date ordered, start and end of the subscription as well as the days left till the subscription expires.

I have to contact all those customers whose subscription will end soon. In order to make this easy for me, I created a worksheet and used an advanced filter to copy all those customers whose subscription will end in 30 days or less. Some customers may already have bought a second subscription and thus don't need to show up on the filtered data. Please have a look at an example:


In this example, Simone has two subscriptions: One will end in less than 30 days and the other will expire in 155 days. (=she renewed her subscription). With the advanced filter, Simone's first subscription would show up. What do you suggest I do so that this first subscription doesn't show up?  

I've attached an example to this post.  It should be possible, shouldn't it? I am open/free to make changes to the worksheet.Thank you for your help and suggestions
subscriptions.xlsm