People frequently use a Text format rather than a Number format for
columns of numbers. LisaList, when sorting number formatted fields, sorts
them in ascending or descending numerical order. When these numbers are
formatted as text, they are sorted via a comparison of letters. This means
that all of the numbers that start with 1 (10, 15, 100, 1000, etc.) sort
together, the 2's are grouped together, and so on. The only way to
reformat the information is to add another column with the proper format,
then transfer the information. Sort orders and comparisons are discussed
further in Appendix 4 of the LisaList manual.