No matter how the TurboTax developers have changed this particular page over at least the last 12 years, this page has never made any sense. Internally, "Employer match" simply means the employer contribution. The developers now seem to have not only confused the users with the inappropriate naming, they now seem to have confused themselves as well.
To determine the amount that is the permissible employer contribution, just subtract the elective deferral from the total permissible contribution. Note that if you mark the Maximize box, TurboTax prepares your tax return under the assumption that you actually make the maximum permissible employee and employer contributions.
