The number entered in Max Packet size in the QoS Upload configuration (I don't use QoS for download) will be saved as Min Packet size. Manual intervention in
I believe I have found and corrected this issue. Thanks for reporting it.
The problem was not in /etc/init.d/qos_gargoyle however but rather in /www/js/qos.js. The min/max packet size settings were being reversed when the QOS web page was saved.
Attached is the corrected version if anyone wants to modify their router before the next release. I checked the SVN and this problem has existed a very long time. Surprising that no one found it before now. I deduce that the classification by packet sized feature is not much used.