A company is developing a system to automatically analyze customer support emails. The goal is to identify key information to route the emails efficiently. The system correctly identifies dates and customer names, but it frequently misclassifies the company's own product names, like 'AquaPure Filter' and 'EverGreen Sprinkler', as miscellaneous items or sometimes even organizations. Based on this scenario, analyze the potential limitation of using only a standard, predefined set of entity categories for this specific task.