For an HSA, and assuming you are not covered by Medicare, your overall family limit is $7750, plus each person gets a $1000 personal catch-up contribution. Therefore, your individual limits are $8750 but your combined maximum family limit is $9750.
If you have workplace contributions by payroll deduction, they are only entered on your W-2. The HSA interview where it asks what your personal contributions were only refers to direct contributions made with after-tax funds.
An HSA account has one owner only, there are no joint accounts. You need to run the interview once for one taxpayer and then run it again for the spouse. If you exceeded the overall combined total, someone needs to remove some money before the April 15 filing deadline or you will pay a heavy penalty.
If either spouse went on Medicare, that immediately disqualifies them from making contributions, so their annual limit will be reduced. A maximum contribution of $5834 suggests that one of you went on Medicare in September, or had some other disqualifying event. If Spouse A went on Medicare in September and contributed the maximum $5834, then (assuming spouse B did not also go on Medicare), spouse B's maximum contribution would be $3583.
