Thanks William. I'm suspicious the crazy weather this season has affected things. Here's a few more photos of the blotched orange (T01F), now with the second bud open. It has a mark on the lowest sepal that matches a bit of missing colour on the reverse:
Reverse of the first bud with a lighter patch on the lower left petal matching the largest blotch on the front:
All the marks seem to be at the edges, though, and the foliage is clean:
Additionally, the last bud on that small trumpet I posted a few days back has opened and it has an extra bit of colour on the top petal.