Correct me if I'm wrong: When I enter my region's channel and post a message, it is published only with a single hashtag, right?

This doesn't make sense if I'm located near a border of a geohash block - my neighbor across the street might miss the message unless they "teleport".

I think every message should be published with 9 geohashes - the one I'm currently in plus the 8 geohashes around it (North-West, North, North-East, West, East, South-West, South, South-East).

Also when I enter my region's channel, I should see messages from those neighboring regions (maybe with some UI icon explaining that some people you are seeing on the channel might not see that message).