Have we done a Faux Pas?

Hello,

My partner and I are getting married early next year and when we broke the news we let some of our nearest and dearest know. In this group was a couple who have been “on the rocks” for some time to speak. Let’s call them Anna and Andy.

We broke the news and sent save the dates to Anna as really Anna is our closer friend of the two, Andy was introduced to us. They knew they were invited. In the meantime of the save the dates and formal invitations Anna and Andy broke up. Andy actually moved back to his home country in the meantime. We are having a small ceremony so figured instead of Andy a close family friend of my partner could be invited to the whole ceremony instead.
We sent the invitations but in that interim… Andy and Anna are seemingly back together, but haven’t really said so…. Anna doesn’t want to talk about it and we want to respect the boundaries. Andy is invited to the reception and drinks instead. Anna seems to be upset about this and has wanted the both of them at all parts and I think is upset we effectively “demoted” her ex-maybe-not partner. Apparently Andy had moved flights so he would be present for the marriage before the formal invitations.
Could we have dealt with the situation better? Am I wrong to be a little frustrated at the scenario?