It appears that a mistake was made during the surveying process, causing the house to be built on the wrong lot.
The responsibility for the mistake lies with the surveying company or individual who incorrectly marked the property lines.
Yes, the mistake can be fixed by either moving the house to the correct lot or adjusting the property lines to include the house on the correct lot.
The consequences of this mistake can include legal disputes between the homeowners, the surveying company, and the original property owner. It may also result in financial losses for all parties involved.
This mistake can be prevented by ensuring that all surveys are carefully and accurately conducted, and by double-checking the property lines before beginning construction on any new building.