What happened to the "T"?

Several of the aircraft I routinely track operate as Air Taxi, and therfore, file their flight plans with a “T” prefix. For the last month or so, FlightAware no longer shows the “T”. As an example N720MC always files with the “T”, none of the flights since March 11 are listed as TN720MC. Because the “T” is missing,my alerts don’t work properly. Any idea what happened to the “T”?

We now strip off the T (or L for Lifeguard) so you can track all movements for an aircraft under one identification.

Thanks for the info.
That will make things much more efficient in setting up alerts for those aircraft who do often file with different prefixes.