Thanks a lot!!!
You were right, the order files are physical burned on the disc is not the played order.
Thanks to your reply, I re-examined the played order in car, and currently it seems to me that the (very) strange rule for it is: 1st played file is the 10th file (according names’ order), the 2nd played is the 11th (according names’ order) and so on.
For CDs with more than 100 files, then the 100th is the 1st, 101th is the 2nd, and so on.
Later the first files according names’ order are played.
I still don’t fully understand it.
In the future, I’ll use files' names as you wrote.
Thanks a lot,
Shahar