Hi Alex,
1. The Reviews module was designed to be used on a separate page so it is required that you select the Product form the dropdown list. To show the reviews on the Product Details page for the specific product being viewed, currently the best way would be to enable the "Show Reviews Tab" in the Product Details module settings.
2. Currently the ability to send an email notification to an admin when a new review is added is not currently supported; However I do agree that this would be a useful feature. If you have budget in your project and would like a quote to add this feature, please submit a Quote Request at the following link -
http://www.smith-consulting.com/servi...
Let me know if I can help with anything else.
Thanks!