Thank you again for following up. Unfortunately that link did not help. However I was able to solve the issue. I am totally confused as to why / how, but I found that $800 transaction in my banking items "For Review". I accepted it and all was correct. I do not get it, the Nov '18 transaction had nothing to do with the Jan '18 balance, but it was corrected!
Oh well, at least it is correct now!
Thank you again for the help.