I haven't noticed most of what you mentioned, but I have noticed that it will grab a post in the "middle" of a feed as a new article.
The 3 biggest problems with this script as I see it are -
1, It doesn't correctly parse images in feeds to (img) vB code tags. I know the layout can't always match the original, but still displaying them would be nice.
2, It doesn't correctly parse <enclosure> tags into (url) vB code tags. This is most often used for Podcasts.
3, There is zero support for it. I've asked 7 questions in this thread and none have been answered. I'd even be willing to pay a few bucks for the script if support questions would get answered. Welcome to vB hacks I guess.