So I unpacked my Espresso Pure, read the instructioons and am having trouble understanding the uses of the three different filters provided. The instructions came with a few "update" sheets which seem to override the main instruction booklet. Anyway, the pod filter is easy to identify. The other two are similar in shape and volume, one has a lot of perforations and the other looks to have only one right in the center (exactly like the pod filter has). The instructions refer to the unit coming with two "perfect crema" filters and one traditional. And when using the perfect crema filters, you are supposed to insert a small plastic piece into the bottom of the portafilter. It is my guess that the traditional one is the one with more perforations, correct? And if I want to do just a single shot, I use one of the double-capacity filters but with just one scoop of coffee, correct? The instructions mention a single shot filter, which wasn't provided (only the single pod filter was provided). Thanks for any help clearing this up.