The correct systax for using design code IS;800 2007 section 11 ( WSD ) is CODE IS800 WSD
If someone types IS800 2007 WSD , STAAD still runs the file but actual design is performed as per IS:800 1984 i,e, same as using syntax CODE INDIAN
This bug shall be removed from STAAD as it gives wrong picture to designer that IS:800 2007 is followed by Staad.
This is not a bug, this is how the program is designed. The required syntax for each design code can be found in the STAAD.Pro Help, for example in the section Design > D. Design Codes > D8. Indian Codes > D8.A. Indian Codes - Steel Design per IS 800 - 2007 > D8.A.1 General Comments.