I am not impressed

The problem is caused by the pubdate elements on the items. It looks like there are multiple items with *exactly* (down to the second) the same timestamp (e.g. 2 items with <pubDate>Tue, 17 Mar 2009 00:00:00 +0100</pubDate>)

The problem is that twitterfeed uses the pubdate timestamp to determine if an item is new and should therefore be posted to twitter - and will only post items with a pubdate that is newer than the pubdate of the newest previously posted item.

There's two potential solutions:
- create a "real" pubDate timestamp that is unique for each item in the feed
- provide a unique GUID element for each item in the feed. If this is present, you can change the feed settings to let twitterfeed select new items based on GUID rather than on pubDate ( Delete or Edit)

Do you have some control over how this feed is generated? At the moment, the feed doesn't contain any GUIDs, so changing the settings to GUID doesn't work. To be able to consistently post all posts to twitter, you'd have to be able to change the feed so that it either..

a) contains a pubDate which is different for each item
.. or ..
b) contains a GUID

If a), you can use the default "select by pubDate", if b) you can use "select by GUID".

However, if you can't change the format/content of the feed at all, then the only choice you have is to use "select by pubDate", but whenever you have multiple items which share an identical pubDate timestamp, only one of them will be posted.

Hope this clarifies.. ( Delete or Edit)