Sales order re-costing using t-code CK55

[arpitr]

Hi,

I have a custom program where I am using SUBMIT on CK55

SUBMIT saprck_mcso WITH s_vbeln IN lr_vbeln

WITH s_posnr IN lr_posnr
WITH s_auart IN s_auart
WITH p_onlykf = abap_false
WITH p_overka = X
WITH p_overvo = X
WITH p_set_vo = X
WITH p_test = ' '

VIA JOB lv_jobname NUMBER lv_jobnumber AND RETURN.

I have JOB_OPEN FM before and JOB_CLOSE after submit.

When I run this program for first time for any sales order re-costing occurs correctly, but for same sales order 2nd time onward re-costing value gets double.

Can anyone suggest what is wrong with my SUBMIT because from standard CK55 screen re-costing is working accurately.

Many Thanks.