Well, redirects are one of the banes of wikis in general. Each redirect is the result of someone not doing their homework. Double redirects or redirects that are linked by the redirected articles are worse, luckily there aren't many double redirects right now (none as of this posting).
And it's not that hard to check a redirect. Just preview your edit, and if it links to a redirect, fix the link. Five seconds of work, and you've made the wiki cleaner.