Manually editing references in text

Hello I’m using Endnote in Microsoft word 2016.  I’m using MMU Harvard style and have a handful of issues.

  1. When I want to change a reference because it is part of the sentence eg: from (Warr, 2002) states that to Warr, (2002) states that, it reverts back to (Warr, 2002) once I re-open the document the next session.  If the easiest way is just to type Warr (2002) can I just add the long reference to my reference list at the end?

  2. SImilar issue, for my Uni’s required style I need to change all et al., into itallics, if I do it manually in text the change isn’t saved.  Or more confusingly some are and some aren’t!

3.  If I add a reference to my reference list (list that is created by Endnote) manually because it hasn’t been able to import into Endnote, I can put it amongst the As for example but then the next time I open the document it is gone.

I can’t save it as plain text because my supervisor likes the document to be a normal Word document that they can apply Track Changes too to give feedback. Am I missing something simple? Please help!