If a mod adds mission attributes so that the mission.sqm has more than 7 attributes in the custom attributes class then the attributes do not load correctly leading to some attribute being read incorrectly such as mission name.
screenshots:
http://images.akamai.steamusercontent.com/ugc/492394652508218383/8C28CA0A200BA16FDC6D9DCB695C120E2A469326/
http://images.akamai.steamusercontent.com/ugc/492394652508221361/CA6A59ACFA30D78F76CC4B042764930097B665B3/
http://images.akamai.steamusercontent.com/ugc/492394652508226238/0455475349B2ED58F5C636794FDB3152AE3F1E5F/