Right...On the account page, something'll show as an evolved form, but in name for already-posted links it either doesn't show immediately, or just shows as pre-evolved form;

For example, the Riolu I had evolved, yet on places where I've posted the egg, the name still says Riolu even though it's Lucario now. I don't remember putting anything in the name field for the name to stay the same.

An example of sorts; Lucario still showing as Riolu in name in the post after...several refreshes and rename attempts.

Is it me, or is this a legitimate bug in the system? Or do I just have to remove and re-paste the BBC code for Lucario?

Not entirely sure where this thread goes, but this seems appropriate enough...

The system doesn't change the name immediately, you have to change it manually, by clicking the Manage button below the adoptable, and then clicking Rename <adoptable name here>

*locks*

This will be fixed in the future system, by the way.