Magento - Products which dont belong to a particular category displayed under it

I have 2 subcategories under MEN category in store i.e

• MEN
  • JEANS & TROUSERS
  • JUMPERS

When i list the products of the store which belong to JEANS & TROUSERS

i see some products are picked from category JUMPERS

I check their configuration in admin but products are assigned to their respective categories..

Please help me.Thanks 开发者_如何学Cin advance

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Go to the menu System > Configuration > Index Management and rebuild the product index.