Incorrect configuration setting grouping on configuration display page

Usually each configuration setting is displayed in it's separate row, but in some cases there is a need to output 2 configuration settings in same row.

To do that developer must:

• set equal values in Prompt field for both configuration setting database records
• set equal values in DisplayOrder field for both configuration setting database records
• different values (usually 1 and 2) in GroupOrder fields

However I've recently noticed DisplayOrder value isn't taken into account when configuration settings are printed out.