There is no restriction that different fund products of the same fund company can hold the same stock. For example, a fund manager with obvious style may have all his positions in a certain industry, so there are only a few leading stocks in a certain industry, and it is inevitable that he holds the same stock.
It is normal for different fund products of the same fund company to hold the same stock, so investors need not worry. Each fund company has to issue many fund products, so it is unrealistic to require each product to hold different stocks.