Nested groups

I feel a bit misinformed or just shooting in the wrong direction here…

I have groups and nested groups:

Group gAllLights				
Group gMainLivingLights			(gAllLights)
Group gEastWingLights			(gAllLights)
Group gWestWingLights			(gAllLights)
Group gBasementLights			(gAllLights)
Group gExteriorLights			(gAllLights)

and am simply trying to see the output of all those items in a sitemap:

	Group item=gAllLights label="All Lights"
	Group item=gMainLivingLights label="Main Living Lights"
	Group item=gEastWingLights label="East Wing Lights"
	Group item=gWestWingLights label="West Wing Lights"
	Group item=gBasementLights label="Basement Lights"
	Group item=gExteriorLights label="Exterior Lights"

it kinda works (I have other groups and nested groups too. The highest level node in the nest seems to always work fine, but the lower nested nodes don’t always populate in the UI…

I had this same issue in other nested groups of mine last night, but since setting them up, they’ve populated this morning and display just as expected. I’ve read and reread the wiki on groups… is there something obvious I’m missing on why a nested group wouldn’t display its items?

Or is there a different way i could ask openhab to show me the contents of a group? Interestingly the IDE also shows these groups as empty:

is my item config wrong?

Group gAllLights				
Group gMainLivingLights			(gAllLights)
Group gEastWingLights			(gAllLights)
Group gWestWingLights			(gAllLights)
Group gBasementLights			(gAllLights)
Group gExteriorLights			(gAllLights)

Group gNightLightsOn
Group gNightLightsOff
 

//DIMMER 1 Garage Interior	
Dimmer LS_1_FF_Garage_CeilingLight    		"Garage Interior Lights [%d %%]"			(gExteriorLights, gNightLightsOff)