Hey Nomad. Do you remember what tile type this was on? The thing that's jumping out is the old woman's door is linked to Chinatown, whereas the two others are downtown. The encounter situation isn't great, you can get several together if you haven't touched a sector/not launched a mission which had requirements for encounter. The non combat encounters are much shorter (1 hour) so it doesn't burn much time. Trying to avoid any non trivial changes (i.e. anything that doesn't involve changing a value that can be reasonably certain is safe) at the minute that aren't directly linked to a bug, or very important for balance.
I think longer term, it might make sense to add a system which notifies players if there's an encounter in an area, to prevent a sequence of them from happening.