How do I force Twitterfeed to shorten my links?

Currently, Twitterfeed will not shorten my links -- I'm assuming because they are already very short. For example, an average link to one of my posts might look like this: http://stop8.org/#2338

You can see that these URLs don't get abbreviated when Twitterfeed sends them to Twitter: http://twitter.com/stop8dotorg

I've tried turning on and off the "shorten link" option in Twitterfeed; and I've tried switching the service from bit.ly to Digg to TinyURL, but it still won't shorten my links.

I would like Twitterfeed to abbreviate this link because the anchor name tag in the URL causes confusion in some Twitter clients. For example, some clients will think that the above URL contains the hashtag #2338, instead of that pointing to an anchor on my index page. If Twitterfeed abbreviated my link, that problem would go away.

How can I force Twitterfeed to shorten my link?