I would give it a couple more days but it's probably worth calling and getting it corrected. Agents can do it when it's clear you aren't trying to change names to transfer the ticket. I've opted to this when extra middle initials kept getting added. I've posted about this before on FT but my middle initial is K. When I booked used an ecredit, a second K was added so my name was displayed as: <FIRST NAME> KK <LAST NAME>
At first not a big deal but then I made another change and the system added another K in there. For obvious reasons I didn't want my middle name/initial displaying as "KKK" so I called DL and it was an easy fix for the agent.

Hopefully you can call and have a similar experience.