a 'Custom Title' is set in Edit Details, while the Avatar's motto is just an Edit on the profile page. there is also an Edit under the Custom Title.

for over a year, since the Custom Title was instituted, i have had various ones, with a little saying under it. i want this one to be "Energy is Not Lost". but if i use Edit to put that, it changes the motto that appears under my Avatar when i post to the same. and if i use Edit under my Avatar in Posts to change it back to "Be Here Now", then the motto under the Custom Title changes to that~!

if there is some secret vocabulary to explain better, i do not know it.
thanks for your offer to help ~