ggplotly unable to handle multiple legends properly in layered charts generated by ggplot2

From the example in http://bxhorn.com/legends-ggplot/#managing-multiple-legends-in-a-layered-chart

# Multiple Legends
# load data
data(diamonds)
# calc quantiles with specified probabilities
new.prob <- c(0.90, 0.95, 0.99)
cut.probs <- plyr::ddply(diamonds, .(cut), numcolwise(quantile, probs = new.prob))[, c("cut", "price")]
cut.probs <- transform(cut.probs, quantile = c("P90", "P95", "P99"))
# layered graph
gg<-ggplot(diamonds, aes(cut, price)) + 
  geom_boxplot(aes(fill = factor(cut))) + 
  geom_point(data = cut.probs, aes(cut, price, color = factor(quantile)), size = 5) +
  scale_fill_discrete(name = "Quality of the Cut") +
  scale_color_discrete(name = "My Quantiles")
gg
plotly::ggplotly(gg)

1. Multiple legend titles are clustered together
2. Multiple legends are not separated
3. There is extra text ",1" in legend labels

This is the ggplot2 output:

This is the ggplotly output:

Start with the supplied layered ggplot2 example and the ggplotly(gg) entry point, comparing its output with the ggplot2 output. Trace how the two aesthetics and their scale names become legends. Done means the titles are separated, the legends are distinct, and the extra ",1" text is absent.