What KB said. The reason you only see 16 in the IO setup page is simply that this is the default setting. If the 16 buses are stereo, they all have 2xMono sub-paths. You are free to reset the buses for your needs. For instance, I usually need a dozen stereo and a dozen mono(total of 32) so I leave the first 12(of the default 16), select and delete the last 4 stereo buses and add 12 mono buses. I also double-click and rename many as I have standard procedures for lots of my mix work. Learn how the IO setup pages work and you will likely find lots of customizing that will help your work flow. As for 32 buses being a joke, what did you ever do on an analog desk that had 12.....or 8.....or 4
?(not saying that YOU don't need 100 buses, but plenty of us get by with less than the 32 we have available).