Where did 27-52 come from? 

I don't understand why the episodes of SAC 2nd Gig are numbered 27 to 52.  While they are not clearly numbered 1-26 onscreen, this is a seperate series, not a continuation of Stand Alone Complex, which is why it has a different name.  Additionally, the DVDs, at least the editions released here in the UK, list episodes as 1-26.