You and me both!
The way I 'see/feel' it currently is that these 'spontaneous' coincidences are manifested by your heart/body-being. Your mind-being seemingly unaware of the 'coincidence', however it does recognize it as an coincidence. So much for being unaware.
When you then 'follow' the heart-created coincidence, you are 'surfing' a path created by your heart. It feels like everything is clicking and falling into place. Like surfing a wave, pushed forward by an unseen energy force.
And when your mind is creating a faux-coincidence, with the intention of surfing a feel-good wave, it often falls flat on its face.
Often, seemingly, mocked by the heart-being which then starts creating situations that feel like negative (corrective) coincidences.
When you then distance yourself from both your own two beings and become the observer, it becomes quite hilarious at times. This is typically well after the unfolded events and requires some deep reflection.
I have found that becoming the observer is often a healthy way to assess difficult situations, both those created by the heart and those created by the mind.
Now that I write this, along with my obsession of figuring out the third option (the one that isn't), the observer may well be a way of untangling this third option thing.
Who knows. I'm just grasping at straws here.
Those are my current views on the manifestation processes.
There probably is not a correct way, because the would imply that there is also an incorrect way. And one thing that I'm trying to unravel is to get passed these binary options and find the third way, the one that isn't.
Flux, my friend, Flux with Joy and be in awe of the Magic spun by your Being(s).