List of installed packages on Maemo device is wrong

Deleted Qt packages (in "rc" state) are also listed as installed in Preferences/Projects/Maemo Device Configurations/Test:

Device configuration successful.
Hardware architecture: armv7l
Kernel version: 2.6.28-omap1
List of installed Qt packages:
libqt4-core 4.6.2
libqt4-dbus 4.6.2
libqt4-declarative 4.7.0
libqt4-gui 4.6.2
libqt4-maemo5 4.6.2
libqt4-multimedia 4.7.0
libqt4-network 4.6.2
libqt4-opengl 4.6.2
libqt4-phonon 4.6.2
libqt4-script 4.7.0
libqt4-sql 4.7.0
libqt4-svg 4.7.0
libqt4-webkit 4.6.2
libqt4-xml 4.6.2
libqt4-xmlpatterns 4.6.2

Note the 4.7.0 packages from the list above are actually not installed (they are in "residual config" state):

/home/developer # dpkg -l |grep libqt|grep '^rc'
rc libqt4-declarative 4.7.0~git20100803-0maemo1+0m5 Qt 4 declarative module
rc libqt4-multimedia 4.7.0~git20100803-0maemo1+0m5 Qt 4 Multimedia Libraries
rc libqt4-script 4.7.0~git20100803-0maemo1+0m5 Qt 4 script module
rc libqt4-sql 4.7.0~git20100803-0maemo1+0m5 Qt 4 SQL module
rc libqt4-svg 4.7.0~git20100803-0maemo1+0m5 Qt 4 SVG module