MIDI export not working properlu

I created a musescore file called "Garden Anna Sweeps 2.mscz" and attached it.
I do midi export on the one staff (not "Main Score" but only "2" which is showing up as "Piano (1)" on the Export fotm)
I save as "Garden Anna Sweeps 2-Piano_(1).mid" (have attached the file)
As you can see, it is not exporting correctly.
Please help.