On LF/MF WSPRNET reports receptions using the four FST4W modes as well as WSPR. But there is a mixture of modes reported. I'm currently testing using a FST4W-900 (15 minute) signal, but some of those reporting it show the mode as 2, others as 15

Is this a problem in various editions of WSJT-X or something at the WSPRNET end ?

Andy G4JNT