It's hard to dispute field reports....
Any chance the person who submitted it could confirm if it was done after a review of a new license in the database or was it actually heard and reported? Seeing that quite a few entries in the Missouri database for the KC side are submitted straight from FCC records rather than actual monitoring it could explain the P25 designation.
I'm not sure on the FCC rules but perhaps they are not required to transmit digitally even though they are licensed for it.
As for 452.175 its part of a local LTR system, that is why you hear the key ups. What kind of radio are you using?
Gregg