Actually, I think the difference in minimum CLB level based on NOC Code is only applicable for CEC applicants. Did you apply under FSW or CEC?
See below from IRCC's website:
http://www.cic.gc.ca/english/immigrate/skilled/language.asp
Federal Skilled Worker Program
First official language
Language-----------------Minimum level for all four abilities
English--------------------CLB 7
French---------------------NCLC7
Second official language: Minimum level of
CLB or NCLC 5.
Canadian Experience Class
The skills you need will depend on the group your job is classified in under the
National Occupational Classification system (NOC).
NOC skill type or level---- Minimum level for all four language abilities (English)---- Minimum level for all four language abilities (French)
NOC 0 or A---------------------CLB 7-------------------------------------------------------------------------NCLC 7
NOC B---------------------------CLB 5-------------------------------------------------------------------------NCLC 5
Federal Skilled Trades Program
Language------
Abilities----------------------------
Minimum level
English---------Speaking and listening
----------CLB 5
English---------Reading and writing
--------------CLB 4
French----------Speaking and listening
----------NCLC 5
French----------Reading and writing
--------------NCLC 4