FM - double budget consumption

Dear Experts,

We have implemented Funds management for a utility client who wants to control their O & M expenses. here we are following payment budget.

Now we have certain doubt in the Process hence requesting clarification on the process

in FMDERIVE we have defined GL = commitment item and cost centre = fund centre and for movement types we have defined fund centre as "9999999999"

Now during PR creation the user dept entrers the Fund centre manually for O & M stock and further creates the PO - GR and invoice

budget is checked at PR level and same is consumed at PR.

Now when one does goods issue with mmt 261 / 201 in MIGO / MFBF -

Consumption A/c...Dr with cost centre of consuming dept (this is linked with a fund centre for which budget is given)

Stock A/c .............Cr with Fund centre "9999999999" . since for mmt we had given fund centre as "9999999999"

due to this the budget at consuming dept fund centre is doubling.

Now as per understanding there can be either procurement budget else consumption budget not both ??

Please let us know how to rectify this problem

Regards

Gautham.