I suggest that you review your Payroll Withholding report selecting the Multiple Period Analysis view. Menu select View > Analysis > Multiple Column Setup and set your dates for the calendar year 2018 with a Monthly Resolution along with a Periodic Representation. Add a column setting the begin date as blank with a 31 Dec 2017 end date.
From the above view, you will see the monthly Payroll Withholding breakdown with the Perpetual Balance displaying in in your last column for each of the remittance accounts as Payable. You should see where the problems started and where according to your adjustments the perpetual balance will get better and back to normal. You can double click on problems to see the details if the total account indexing is set to Yes in the setup of the report.
The PAYRUN dates you are using are in the Calendar year 2018?
I hope this helps.
Regards to All,