Middle name included in first name

I just booked award flights home to the US from Italy for my wife and I through United for April. The flights are serviced by Lufthansa though. Looking at the itinerary details on the Lufthansa app, they are appending my wife’s middle name to her first name, then still including her middle name in the passenger details. Ex: Janemarie Marie Doe. I spoke to United who said they left a comment on the itinerary that the middle name (Marie) should not be duplicated. I then spoke to Lufthansa who said that on their end, they just see Janemarie Doe and the CS rep confirmed that it shouldn’t be an issue when we get there. I’m still a little stressed though with it being an international origin and not exactly trusting CS reps. Is this something I should worry about? Her passport includes her middle name, but obviously with a space between them if that’s any help.