OS X V10.7 Lion :: Multiple Documents Un Single Window In Preview

I mostly use Preview.app (on Lion 10.7.3) to read and annotate relatively large pdf documents (articles, reports, etc.). While working on a given project I tend to have many pdf files open at the same time. I personally would like to have all of the pdfs I use open in a single window, so I have Preview set to "Open all files in one window" (Preferences > General). This setup initially worked very well since it allows me view all of my open documents in the sidebar (similar to tabs in a browser window). The problem is that when I switch from one pdf to another, the position of the pdfs (i.e., the page I was on when I switched to another pdf) is not preserved. This seemingly defeats the purpose of having this functionality in Preview,is this the intended behavior of this setting, or is this a bug? In either case, is anyone aware of a fix for this? I just want the documents I'm reading to preserve their positions when switching between them when opened in a single window.