If you are entering results data in Shooter entry mode, BUG division entrants will only have BUG stages displayed for entry:

Within the data entry form, the Next and Previous buttons will take you through the BUG stages.

 

In this match, I've designated three BUG stages and six total stages.

So my BUG entry shows complete when three stages have been entered, whereas my SSP entry still shows incomplete with five stages entered:

NOTE:  If for some reason you want to hide BUG entries temporarily, check the box.

If you have selected to enter data by stage or in Direct mode, and attempt to enter results for a BUG shooter for a non-BUG stage, a warning box will appear: