You have an amazing garden, Erika. You can tell just looking at the plants that a lot of work and passion has been spent on it.
The spots on the currants are most likely due to the rain. And, unfortunately, there is not much to be done.
As for the plum fruits, apparently they fall due to missing minerals in the soil (phosphorus and potassium) or due to a high quantity of nitrogen (do you have beans or peas near the plum trees?).
But hey, what would be gardening without challenges? 🙂
Thank you for your continuos support. 😘