Yikes!!! You might have to pay that off to get in the mortgage. If you pay it and it has to stay on your report, it should fall off sometime in 2020 depending on you DOFD. If somehow they are stating that your DOFD is 2018-2019 then that is a reporting inaccuracy and is grounds for dispute and could possibly be removed that way on the grounds of them not being able to validate it properly..Hopefully others will chime in and help you with this. Good luck.
The DOFD never changes the date that they are reporting is just the date that they bought the debt and had permission to report it to the credit bureaus. If it defaulted in 2013 it would still fall off the original 7.5 years from that year which is somewhere in 2020.