[Zubersoft]

If you want to search by a number, it might make sense to try the Sort->Numerically option (tap the sort option at the top of the screen when viewing the Songs tab). This will work well if you put the number at the beginning of the song title. It may still work if it's located elsewhere in the title so long as there aren't other numbers earlier in the title.

As for the searching issue, I'll have to look into that. That sounds like a bug if you can't search for a single digit.

Mike