Torrie
The links I posted earlier are worthwhile having a look at before you start:
www.rootschat.com/forum/index.php/topic,24468.0.html - Researching in Scotland, in particular where to go to for records and what information is contained on certificates post 1855
www.rootschat.com/forum/index.php/topic,43916.0.html - how to get the best out of Scotlands People, the official pay to view site for BMD and census original images.
Regarding your questions, this will be covered in the links above but briefly. You need to buy a minimum of 30 credits for £6GB. When you do a seach, it costs you 1 unit (£0.20) to view the search results and then 5 units (£1) to view the image of the certificate on line. You then can save the image on to your computer and print off.
What you are viewing is an image of the actual entry on the register.
Wullie has already kindly spent some of his own SP units looking at the images on SP it would seem

The information he included in his last posts confirms what we have been discussing, so certainly the birth certificate looks to be the right one from the information that Wullie has transcribed from the cert.
Monica