Had the same issue the first time I was using Uber, around 1.5 year ago. Uber is not available in my region, and I was in the States, wanting to catch a ride with my colleagues to the airport, so that was my first time in the app. We were going long-haul and had a lot of luggage. First car that comes in is a Corolla in which there is no way we could fit. The guy (in poor English) tells us to choose a bigger car. We try to tap around, just to get a Jetta.
At the end we asked a guy in a shop near the spot we were waiting, for him just to swipe the ride type right to left. Felt like an idiot, because the three types available at were perfectly centered and aligned.