yes or better no. you're not missing anything. it is not possible to aux-send from a bus that is listed after the originator one. although just by chance, it may work from a later to a previous one (eg. the very first, often called "Master").
nb. this kind of idiosyncrasy is an internal processing flow design one, not quite a bug. in reality you're not supposed to connect inter-output-buses at least directly so. it just happens by chance through due to the existence of the aux-sends pseudo-plugins, that vaguely allows for it, even though they were meant primarily to re-route from tracks or input-buses to output-buses.
yes or better no. you're not missing anything. it is not possible to aux-send from a bus that is listed after the originator one. although just by chance, it may work from a later to a previous one (eg. the very first, often called "Master").
nb. this kind of idiosyncrasy is an internal processing flow design one, not quite a bug. in reality you're not supposed to connect inter-output-buses at least directly so. it just happens by chance through due to the existence of the aux-sends pseudo-plugins, that vaguely allows for it, even though they were meant primarily to re-route from tracks or input-buses to output-buses.
hth.
cheers