Hi Michael,
Please report this to PMDG. I have checked the database behind all three approaches, and they have the correct waypoint sequence in our database (based cycle 2502):
Here are the sequences for LOC 16-X:
… here are the waypoint sequences for LOC 16-Y:
… and here are the sequences for LOC 16-Z:
So, the data in the database looks correct so far. I can´t identify any data issue here.
Thank you very much,
Richard