[amsat-bb] AO-73 QSOs on the beacon?

[n0jy]

During the eclipse passes while copying telemetry with my Funcube Dongle 
Pro + I am hearing SSB QSOs on the beacon frequency.
They usually "walk" across it but what puzzles me is that the website 
info indicates that the transponder passband is well away from the 
beacon frequency.
Am I experiencing some weird stuff with my Dongle or is it possible for 
stations to work on an uplink that puts their downlink on the beacon 
frequency?

Thanks,
Jerry
N0JY