When sorting by the Due By column in ServiceDesk Plus 7.5 the items with no due by are filed alongside those closest to breaching SLA rather than those furthest away as would be logical.

For example, sorting by due would get you:

-

4th October

20th October

and

20th October

4th October

-

Clearly the logical ordering is

4th October

20th October

-

and

-

20th October

4th October