Behind the scenes, HealthCare.gov is still a mess.

The “back end” of the Obamacare website still isn’t properly wired to the health insurance companies. It’s slow going for health plans to make sure the 11.4 million people who have signed up end up in the right plan. Subsidy payments aren’t automated, so the insurers get payments based on estimates. And adding information like a marriage or the birth of a child is a convoluted, multi-step process.