What item merge is, is a pain in my ass. Every single week it seems like I have to sit at the signing or receiving computer for 15 - 20 minutes manually retieing the UPCs for half of the DPCIs on the report myself because they're still scanning as the old DPCI.
For some reason, this issue is almost exclusively limited to HBA and COSM items.
Although I do have to say that for the current report, I didn't have to do it even once.
If you are talking about the list that populates in an Excel worksheet, that has never worked for me. I always had to pull up the report under store reports on workbench.
You can relocate items using LOCU.