The Obama administration — in yet another health care overhaul delay — has quietly notified insurers that a computer system glitch will limit penalties that the law says the companies may charge smokers. A fix will take at least a year to put in place.

Older smokers are more likely to benefit from the glitch, experts say. But depending on how insurers respond to it, it’s also possible that younger smokers could wind up facing higher penalties than they otherwise would have.

Some see an emerging pattern of last-minute switches and delays as the administration scrambles to prepare the Oct. 1 launch of new health insurance markets. People who don’t have coverage on the job will be able to shop for private insurance, with tax credits to help pay premiums. Small businesses will have their own insurance markets.