It happen to me too. I have created a chant last week, 1 national anthem, 2 chant for Kedah team (league team). Now adding two more, I lost the commentary. I retested my patch. I add only 1 chant for Selangor team. Save and close, then go to commentary, all commentary are listed as expected. Now I close commentary and open chant. This time I add 1 chants for Selangor team also. Add the wave file (stereo/24000hz), add new reference and do as usual.
Save and close (and save again). I go back to commentary. Weird, all commentary are gone.
I only have 5 chants. The fifth addition create the problem.
For quick info,
Selangor 1 - SELGR0002
SELANGOR 2 - SELGR0801
Both name length comply to you suggestion. However as for the sound, I did at first create an audio with 40 second long for SELGR0801, but already cut it to reduce below 30 second after comparing with other original team chants in game. Most of the chants are below 30 sec. But that too didn't do anything. Once I add the 5th chants, regardless of whch added first, the commentary gone.
I think it has to do with naming or adding more name. Hope the problem explain above helps debugging SM09. Great software. Already have my national team have the commentary added. Excellent.