When PotG says error strewn he means factually incorrect. WZ is well known for posting something factually incorrect but very quickly altering his post so he doesn't get caught out. Problem being people have already read it but haven't had the time to quote it. It's very similar to his predictions - he very subtlety alters them over time to suggest he got his predictions correct.
Thank you for explaining the post. I am sure he is grateful.
Anyone who makes a factual error or prediction would do well to amend it, don't you think? Especially if others are looking to 'catch him out'.
PotG does not say the posts are altered quickly; in fact he suggests take a long time ('much later') - so your comment is factually incorrect. I am sure you would have changed it on reflection.
Thanks too for avoiding unnecessarily hostile language.