Legal directions and distances (AKA COGO) are based on survey observations. Every survey observation contains an error.
The size of the error is related to many factors, including the type of survey instrument that was used.
When creating a closed traverse, we can calculate the misclose that is caused by those errors and distribute it using a variety of methods.
I would make sure that you are using the correct 'Ground to grid' correction (aka 'combined scale factor') if it is mentioned on your legal document.
If you create a geometry that is slightly short (aka 'undershoot') or slightly too long (aka 'overshoot') , you should keep the legal measurement as it and adjust the geometry. You can use the 'Extend/Trim' tool, or the Edit vertices tool. That way you captured the legal dimensions as well as the correct geometry.
I hope this makes sense
