Paste issues

[tindog]

I'm in Word 365, I have two docs that need to be duplicate, I've made adjustments to one of them... so now I'm trying to paste the new text into the alternate... I need it to retain some of the formatting from the source doc, and some from the destination doc... Originally, choosing "merge formatting" was getting me close, but my paragraphs that had no indentation were coming out indented, everything else looked good. But somehow that changed, now I'm losing all indentation, so each line in left justified. As far as I can tell I didn't make any change to account for that. What I would like to know, is there a way to choose what formatting features are kept from source to destination? If not, how can I get my program back to what it was doing... no settings I adjust seem to make a difference.