The reason for appearing the PF 36 into your customer creation is..PF 36 is assigned to your account group which is used for your customer creation.
If the PF 36 is not relevant to you just remove the PF 36 assignment from your account group so that it will be appeared in XD01.
And also check whether 36 is PF or Partner determination procedure.Even it is Partner determination procedure remove this from assignment of account group so that it will not appear once again.
Please let me know still if need any further help.
thanks,
Srinu.