Description from punch out catalog changing

Hi,

We having classic scenario with GOA on SRM server 5.5 and CCM 2.0.

We are facing problem while creating shopping cart using punch out catalog of our vendor.

We have found that description coming from punch out catalog is getting changed once we select plant or storage location on basic data tab. This description of material is getting replaced by descrition of material maintained on basic data tab in ERP.

This is happening for only two vendors. Can anyone throw some light on this? What could be possible reasons? What should be checked to ensure that everything is fine.

Thanks in advance.

Regards,

Umesh