A new estimate of how many people received MaineCare benefits due to a computer glitch adds more than 5,000 beneficiaries to the previous count. The state Department of Health and Human Services originally estimated that the computer error led the state’s Medicaid program, known as MaineCare, to continue covering up to 19,000 beneficiaries after they lost eligibility at the end of last year. The Bangor Daily News says Thursday that a report by a working group looking into the bad payments found an additional 5,300 people who mistakenly received coverage from Jan. 2 to March 10 of this year. The working group is expected to brief the Legislature’s Appropriations Committee on Friday. Meanwhile, officials are trying to come up with a figure on how much the error will cost.