SN Award booking class code?

Search this board but no luck ---

Just booked an *A business class award ticket with an SN TATL segment. On CMT it shows "Economy".

Then went to LH site to check (my ticket also has an LH segment), surprisingly, LH shows:

SNXXX: Economy (I)
LHXXXX: Business (I)

Isn't class "I" universal for *A business class award? Anybody can confirm that would be very much appreciated...