It’s actually quite important that the ‘i’ is visible in the name of the city here. The coinage for Dorylaion, which is very rare, has been controversial since Imhoof-Blumer attributed these coins to the city in 1902. Because we know next to nothing about the history of the city at that period, and because coins from Phrygia are not well known at that time, others thought that it may instead be from a similarly named magistrate of Hierapolis.
When more coins were found, however, that showed that it was spelled ‘Dori’ instead of ‘Dory’, then the only logical choice not Dorylaion but another Phrygian city called Doriaion. The resolution for some reason did not make the world news.
I was not able to obtain much information about this city outside of the numismatic debate, although Strabo did mention a Dorylaion in Phrygia.