I have an issue with Relate products.

Example:
Product 1 (Category 1)
Product 2 (Category 1)
Product 3 (Category 1)

I have three products in my store. I have added the product 2 and product 3 as related product for product 1 in admin section. I did same with all products. Product 2 having its related product as product 1 and product 3. Product 3 having its related products as product 1 and product 2. I did all in admin section. But in products detail page all the two product are not visible.

On product 1 details page both the other two are visible as related products. But for product 2 only product 3 is visible in related product and for product 3 only 2 is visible.

I can\’t understand the magento behaviour for related products. On which logic it shows related product in related product section in frontend.

I have tried that with fresh installation. But the thing are same. I can\’t see the product 1 in product 2 and product 3 details page as related products. That\’s done in the admin section but does not effect the frontend.

can you help me to find out the reason and solution how to show the product 1 as related product for product 2 and product 3?

Thanks in advance.