Hi Gailjj, I am a new Cameo owner, have had mine a little over a month. I have learned a lot in a short period of time, so I will try to help. What type of cardstock are you using? I have had great success with American Crafts. I also use a lot of Stampin' Up! cardstock and it took a bit of trial and error to find the right settings. For my machine, I use 7 blade depth with double cut and it cuts perfectly.
As far as the designs in the online store, printable patterns are papers you print with your printer. Print and cuts are images that you print first and then cut out with the Cameo using registration marks. Regular cuts are shapes that you cut and layer to create the design.
Also, there is a forum specifically for Silhouette users called Silhouette Plus, the ladies there are very knowledgeable and helpful!
Proud Member of the Fan Club
My Brand Spankin' New Blog InkyPalms