Is your view detail level setting the same; i.e. Coarse vs Medium vs Fine?
If you have a View Template, is it the same template?
I don't know how the metric cut-plane settings are normally so I can't help much there :hide:

Conventionally look at 1200mm AFL for the metric cut plane.
agree with chad, set detail level to fine.
If you go to the first floor, you can create a view template from that using all or some of your graphical settings. Just right click on that view name, and select create view template, then after that is done go to the 2nd floor view, right click on the name and select apply view template and choose the one you made. View templates however don't contain view range settings, but do contain a lot of graphical content, allowing fast ability to match views of similar requirements in a project to each other. Graphical consistency.
Somewhere in his book, there should be mention of view templates, hopefully.
There are many resources available for learning, among them being youtube channels, Autodesk, Bimscape has a great free Introductory series and also Lynda.com if you have access.
Texts include the Mastering Revit Architecture series by Eddy Krygiel et al, No experience Necessary by Eric Wing, and others. The books are great, I'm biased. Always like to have a hard copy to leaf through. Pick them up, and always find a gem.
Some texts like daniel stines use a actual build tutorial whereas others use chapters on areas and explanation of theory. I think the latter will be more use to you further down the track.
Just remember as you progress through the book with him, don't just play 'follow the leader' and end up with a building at the end, but see what tools he is using and why. That's the reason behind tutorials, the building is purely a vehicle for demonstration of tools. Grasp hold of this approach, and your learning increases tenfold.