I can see why if there are some cells that have more than 1 stop you could come to the conclusion that it must be possible.
However as others have said the reason this has happened is nearly always due to malicious manipulation in the past. Niantic has been taking strong action on these and the people that did them.
But a Golden rule in Wayfarer is don’t use what has happened in the past as something that will be suitable or work now.
There are posts on this forum where areas that have had this abusively created density recalculated and stops removed. Mass removal of Pokestops in Sydney Australia
It’s been a hard frustrating lesson for you to learn but I think you now understand exactly how the inclusion rules work and will take it into account. You can also explain this to any locals that you meet to help prevent others being frustrated.
I hope you have some more successful nominations.