And that seems to be the correct one.
So the other 2 options are off (what amazes me from the API method)
I think you might have discover an issue with the advanced settings.
And not necessarily with the PowerCLI cmdlet, since the API method also seem to show the incorrect/old value.
I would suggest to open a SR, and yes PowerCLI is supported, even without a Developer Support contract.
Point the GSS person to PowerCLI Support Breakdown
Lets see how it goes