i am not sure we can use shelters at that base as any sort of measure of number of awacs. yes, it appears they added two more shelters recently. up until a year ago there were 7. But, those 7 were there since 2005, when kj200 programme was just in prototype stage. And yes, that is 7 in addition to 4 ones for kj2000 system, which are separated from the seven at the south end of the airbase.
It is clear other sort of planes, just not awacs, were using those shelters there. While adding two more shelters may indeed mean two more kj200 are being added to plaaf, it could also just as well mean those are shelters for other kind of new planes or perhaps just belatedly built shelters for existing planes, be those kj200 or other sort.