I think not, but in this case Raya was trying to set LD as her display group, and that was the one that wasn't allowing it. That seems to be what was keeping her sig from showing. Others in the LD group have sigs, but they don't have LD set as their display group. The plot thickens more, because LD can't be set as a display group, so it's not showing as hers, but it is set that way in her profile.
Phyllis in Ukraine, with Jaan (AO grad), Raia (AO grad), Asya (age 17), Bogdan (age 13)