There is some problem (and now I see it is also on Pinmapple): when you just go to the place on the map, it won't show all the pins that are there. For example, just open main page and type "Złotoryja, Poland" in search box. It will lead you to the place with no pins. But if you do the same from my map profile, you'll see pin leading to one of my old posts. It might be because it is a pre-Pinmapple pin from Steemit World Map. On the other hand so is the pin from that post and it shows normally.
As a side note it doesn't really work on Firefox. Pin groups show as barely visible boxes with numbers, and frequently even if the pin is visible, it is not clickable. Also at times after refreshing page, pins get doubled.
All I know is that if some of your pins were featured then they can be seen in all the map and the rest can only be seen in your profile.
Interesting and worth a look.
We will add this to our list and have a look to it, whenever all core functions and the curation is running fine.