Am I missing something? 
I am noticing that when I try to homebrew a background, it doesn't let me mass load Personality Traits, Bonds, Ideals, and Flaws. You have to add them in individually. 

Why is that? Why can't we just add in a table? 

I haven't tried creating homebrew background, to be honest, but I'd suspect this is due to the fact that in the character builder you can add the single Personality Traits to your character, and therefore the system needs single entries for each in order to be able to add only the relevant text.

I understand that, but adding one personality trait at a time to build a chart line by line is stupid, 

Just have one of these boxes and delineate by "';" it's not that hard. 

That would undoubtedly be easier, but unfortunately we have no way of knowing exactly how the system is coded and how easy it would be to integrate a ";" separated list in the current system.

Here's to hoping someone from the staff can shed some light on this :)