As your company grows, it becomes harder to ensure that everything important comes across your desk. Employees looking to take initiative may try to handle things on their own that are best handled by you, or your attorneys.
Any employee with the apparent authority to enter into a contract can bind the company to a contract. Even if that employee did not have the actual authority to do so.
Proper training of employees, and systems to review contracts must be in place to ensure that your employees don’t have you making conflicting promises, or entering you into obligations that you cannot meet.