Possible Child-Theme Bug

Hi,

I have created a new child-theme from the Created Child Theme tab, selected all options, then clicked the download child theme button, all is ok. I then (after reading on this forum) changed the child-theme style.css template name to CT (without the square brackets) as it was originally named [XXX] (with the square brackets). After doing that, I was able to import the child-theme, but now I am faced with another problem, and that is when I change the child-theme, any changes I make are now reflected on the parent Premium Press Classified Theme.

Is there a quick fix to this or will this take another update?
Brian