Would someone have a look at my garden? It says the Ace is too high for Dinah, and too low for White Rabbit on both plates....haven't moved the ace~

I haven't moved the ace, but I'll leave it for one more feed on each plate and see what happens~ Thanks~

The Dodo was spotted on your ace.   The number you needed changed at that point and not the rabbit is telling you the ace is too low.

There is nothing in your garden saying the ace is too high. The ace cannot be too high, anyway as it is the lowest card. If you look at the plates, it tells you what card each visit relates too. You have two visits where Dinah says a card is too high, one is a 2 of diamonds and one is a 4 of diamonds.
As Karen says (above) once your dodo visited, the ace (which was the correct card for the dodo that time) was too low for your next dodo. The card needed to attract each caucus race critter changes each time one is spotted.