It's not really a mistake, I mean there is nothing in the application that says that if my name contains Ø that I have to write OE, in both instructions and manual it only says "as written in your passport" and the closest you can get to an Ø is an O.
Mine got rejected due to a mismatch in my name and my passport. Paid 340 USD.
I wrote my name Bjorn instead of Bjoern (in my passport). Do you think they will allow me to change that or do they really expect me to pay another 340 just for one letter?