How can I change the default sorting behavior on JIRA Filter?

[Eva]

We have a column call category (select list) and we have a requirement to sort this category as follows: Blanks, 1A, 1B, 1C...etc. But in current JIRA, blanks is somehow has a bigger value than text. If I sort descending, it gives me Blanks, 1C,1B, 1A. If I sort Ascending, its 1A, 1B, 1C, then blanks. Can someone let me know if I can chnage it without changing JIRA source code?

Thanks in advance!

[Hugh Prior]

I'd be inclined to accept that this is the behaviour as is and it should not be changed. Making it the other way round would likely cause other problems elsewhere.

Therefore I would suggest to ensure that the "category" field has a default which does sort to the place I want it e.g. "9Z" or ".".