Ubuntu One Music Store misidentifies some purchases as removed

Some of my first purchases from the Ubuntu One Music Store are showing up in the Downloads section of the U1MS as removed from my library, but the tracks are still present. Why does U1MS think these tracks don't exist in my library if they do? How do I tell U1MS these tracks do in fact exist? I don't want to click the re-download link as that would be a waste of one of my re-download tokens.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: banshee-extension-ubuntuonemusicstore 2.1.0-1ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic 3.0.0
Uname: Linux 3.0.0-7-generic x86_64
Architecture: amd64
Date: Thu Aug 4 11:10:56 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110728)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: banshee
UpgradeStatus: No upgrade log present (probably fresh install)