Merging two sheets

Hello!

I am attempting to merge two sheets together; however, the columns are not always the same. I need the columns that are the same to append under eachtother and then 0’s to fill the columns that the first sheet does not have. This is my current workflow, but it keeps making duplicates of certain columns rather than concatenating them like I would like.

For example, I have 3rd Shift OT Premium and a 3rd Shift OT Premium (#1). Instead I would like those to be concatenated together