How correct invoice notification of approval herarchy

 Hi Member,

My name is amir Nadeem, and my direct number is +923222593851. our client use AP, GL, FA, CM, AR, Treasury, and Project from financial family. our client used for invoice approval AME invoice approval work flow but one person approved the invoice but it's does transfer to the next person. Senario are as follow:

Approval Group in the system

Mr. A(Accountant)

Mr. C(Approval Authority)

Mr. D(Checking Person)

Mr. E (Payment Person of Finance Dept)

Invoice follow are as follow

Mr A check the accounts and delegate the invoice to Mr B is a person who approve the invoice before Approval Authority Mr. C. In my this case Mr B approve and invoice form invoice action history show Invoice notification in the Mr C but unfortunately it's did not available in the Mr C user. In this issue kindly suggest me what can i do in order to resolve  this issue.