Earlier quoted context omitted.
The goal posts keep moving. Let's get back to what you wrote above. Are you able to find that agreement about NATO expansion or not? Can you explain why countries want to join NATO so bad?
The US Embassador at the time confirmed this was agreed upon!
And as a bonus feature, in the same clip, USSR's Minister of Defense (1987-1991) says that he's never even heard about it. USSR's Minister of Foreign Affairs gave a similar interview in 2014 too and also called the story BS, adding that he finds nothing wrong with the way Eastern Europe joined NATO.