I have been pulling my hair out over this issue. With the abundance theme enabled I am always seeing the product excerpt and description with the lowest product ID, regardless of which product I view. I have un-installed and re-installed both woo-commerce plugin and the abundance theme, but the issue won't go away. If I switch to another theme, for example twenty eleven, I always see the correct product info.
This is the site: http://www.stafferton.co.uk/leasing/ - look at new car 2, 3 or 4 and you see summary of new car 1.
This has happened once already (yesterday) and I re-installed wordpress to a new directory, and the issue was gone. However through thr course of the day something has happened to cause this issue. I have kept a log of all file changes made, and I have reset them to original , but the gremlin that crept in stuck. I am about to try one more time, and test product display after every single time I hit save but this is taking me three times longer than normal to build a site! Sorry this is a bit long, thanks for reading and any help greatly appreciated!