Aspaen

I very, very, very rarely block anyone...to the point of it being years (I have been in SL for an extremely long time, this is just a more recent account) between each event. It takes extremes for me to block someone (I usually just ignore them). I blocked a player several months ago in a roleplay sim...I wanted to continue roleplaying there rather than leave it due to her (why leave 30+ wonderful players over one?), thus why I blocked her. I used to be able to speak in group chat, and I would not see her posts when she spoke in it. After a brief haitus from SL, I came back...and now whenever I post in the group she is automatically unblocked and I see her posts. Does anyone know why this is, or how to prevent this? Why would it suddenly change? She has not bothered me in IM again so I am not too concerned about her, but quite frankly I am bothered by the fact SL now automatically unblocks people without my permission.