Determining if a One Time Override was done

 We have an employee whose pay check had too much deducted for medical and dental premiums and I am trying to determine why.

 In the F0719 I see two additional records that would cause the deductions to be incorrect.  I can also tell that these two extra records have a different work date from the other valid employee deductions on this paycheck.  What I can't tell is how these extra records with the odd work dates got there. 

Is there an audit trail of some sort for one time override entries?