Hi Art,
This sounds like an issue that could best be answered/debugged by the developers of ParksnPeaks, where the SMS interface is.
The WWFF Spotline spotting service has a documented API that is used by other software for integration. Without knowing the details, my impression is that Parksnpeaks.org intends to use it (see https://spots.wwff.co/info under “Apps that integrate with Spotline”), but perhaps there is something with the SMS that still needs work.
73
Kim OH6KZP