I'm new to this forum, and I feel that I'll find the answers to the questions and problems I'm facing

I'm new also to scientific workplace, I've done a lot on it, and so I'm designing statistical physics lectures, and so far everyone says it's nice

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http://www.samer.ws/Statistical.pdf
The previous link shows the document I created, I'm facing some problems with it, which are the following:
1- I can't number figures independently, Which means that figures contain unnumber captions, and so I used "Display" to number them with equations. Can anyone tell me how to number them independently?
2- When I number figures throw display equations, the number becomes in the bottom side of the picture, I tried to mess a lot to get the number in the vertical center side, and finally I succeeded in applying that to figure 1.3.8 in page 15 in the PDF, but I couldn't now how that happened. Can anyone please give me the steps to do this?
Thank you