No worries if you see your names appearing altogether in your booking! Certain airlines have reservations systems that do not have a middle name field; therefore, once your ticket is issued, their automation system automatically combines your middle name with your first name. This can also happen when a passenger's name has a lot of characters.
As long as your entered your name correctly in the app and it appears in the same order as your travel document (passport, driver's license etc.), you shouldn't have any problem checking in at the airport.