WCF consume and expose issue with header and derails part

Hi All,

I have a wcf service which takes input as follows:

But When I cosume the wcf service in orchestration then I got the schema structure as follows:

If you see in the above structure; DiscomCode is the sibling of DemandDepositionMC.

After consuming this service,we got a default port which accept 
DemandDepositionDC (multi part msg) as a input which does not contains
any discomCode while the original service  contains DemandDepositionDC 
as well as DiscomCode as a input
as seen in the figure 1 .

So thats why I am unable to get the correct input after exposing the
orchestration.I think DiscomCode should be the child of
DemandDepositionMC.

Is there  something wrong in original wcf service?Should we change the original wcf service Or we can handle it in biztalk.