1) The initial figures are hopelessly outdated. The number of modern ships in service (considering 054As) are at least double the given figure
2) Yes, as several members (especially tphuang) have stated, the Chinese have yet to fully implement all experience gained from new, modern C4SI onboard the new ships. I'm sure most of that has been implemented into new ships, but regrettably the old ones need to undergo severe refitting to be able to use some of the modern twists such as satellite coordination and control. It's not a matter of capability, rather a matter of hopelessly outdated materiel still dominating PLAN arsenal.
I'm sure this will change as time progresses. We have rumors of continuing PLAN construction of new vessels that hopefully will implement the new C4SI abilities the PLAN has acquired through independent research or through secondary sources.