...is treating the numbers as if they were letters. So 1, 11, 111 etc would all come before 2, 22, 222 etc just as a, aa, aaa would all come before b, bb, bbb. Anything that begins with a 1 will come before anything that begins with a 2 which will come before anything that begins with a 3 etc. There must be a setting somewhere to tell the tablet to treat the file names as numbers and not as letters.