Yes it is a bit of a shame. I suspect people are going to different place and recording different things, I have carried out various analysis of this but it is tricky as there are so many other factors involved.
From my point of view I would not have made that collection of Poplar observations Poplar identification and possibly also not the frosty ones https://www.ispotnature.org/communities/uk-and-ireland/view/project/801220/frost-damage-to-plants nor so many observations from the allotment https://www.ispotnature.org/communities/uk-and-ireland/view/project/293866/eaton-avenue-allotments
Possibly also not chatted so much to others on iSpot.