Cost Assignment defaults

Hi,

In info type 0015 assigned a wage type with some amount and also assigned a new cost cener by clicking the button cost assignment defaults to post the wage type amount to a different cost center .

But in posting, its picking all the amounts to one cost center which is assigned in IT 0001 even though a different cost center is assigned for wage type in IT 0015.

any inputs on the above issue??

Thanks.