ok, well, i probably totally missunderstand what u mean and want, nevermind, someone else may has a answer or a solution for you.
sorry, but i dont work with bouquets and it seems i dont understand your approach.
i use network's (dvb-s/c, iptv) - mux's (frequences)- services's - channels - tags (group the channels, multiply tags possible)
if you want to "merge" your services, check channellist or services, attached just as sample how this looks here, multiply sources (should be in your case the same from your different bouquets) assigned to 1 channel, so u dont have multiply entries for the same channel ...
as bouquets are completely out of my sight ... sorry, may there is someone else who can help better.
EDIT: added channel view with my description