Hi,

Zixzax should run to a newly unlocked portal each time you get near him, so there is indeed something wrong if he doesn't do this. Could you send us a report.zip from our support tool?
It can be found here: http://www.larian.com/OriginalSinAlpha/AnalysisTool_DOS.exe
Simply run the tool and click generate report, then send this to supportdos@larian.com with a small description.

Thank you