We are having a issue where the Direct Ship Revenue Recognition report (Y_DE1_16000096) is showing a posting date different than the invoice date, I tried to analyze and found that this date is being picked from the Actual GI date from the delivery, but as per the description of this field in the report it says "this is the date when accounting entries are posted in SAP" that means this should actually be the invoice date
Please help me understand is there a setting for this or is this a bug
It looks the report (Y_DE1_16000096) that you have mentioned is customized report. It might be possible that posting date be Actual GI date from the delivery. When GI done, it creates accounting entries.
If the scenario is Direct Ship (Third party shipment), then you may need the date to be invoice date. So check whether you can modify the report for drop shipment data.
What version of SAP you are working with? I could not find the report in ECC 6.06, hence I assume your may be customized report.