No matter what, it has to be faire on any comment. Anyone who is interesting in the RBQ and also honest can get clear information from the link below.
It seems your contractor is insisting on the item 1.2 and1.3 under the RBQ which “喜乐居” doesn’t have. The website from the above link clearly illustrates difference between the general contractor and others.
The following screenshots can explain the topics being argued here.
I think it is the difference between Schedule I and III.