Yeah I had originally thought it would be like that, but unfortunately its not. One of my biggest qualms with Rx is that their tagging of questions isnt very well done.
For example, its advertised as a complementary study material for First Aid, and while it definitely helps its hard to actually do a section and then do the questions.
What I mean is, if for example you just finished the reproductive chapter in First Aid, the questions in Rx won't only be about material in that chapter. Which is good to really tie everything together, but its also pretty depressing when it comes to scores. Whats worse is when they ask about something that isnt even in FA and you just look at them weirdly.
I also think their questions are a bit more convoluted than UWorld, but its still a helpful study tool