issue with the IDOC creating workflow

Hello,

We have an IDOC configuration for creating PO confirmations, when I check the relationships in the PO I can see a lot of IDOC nos but only one IDOC exist in WE05, please suggest what are these idoc nos and why only one IDOC actually exist.

Among all these IDOC  nos only first three exist in WE05.

tHANKS,

Balu