Hi Dan,
No irritation here 
If you have indeed placed the PSX download as per instructions at Correct PSX Mapping for the FMS Data Manager, you should be able to see the updated cycle info in the CDU as it is included in the data. You have confirmed the SIDâs look current, which suggests you have loaded it correctly.
If not I would check the PSX forum especially if you âseem to recall reading somewhere that the CDU displays the cycle incorrectlyâ.
Cheers
Ian