?am I missing something with Hyrdosphere and Support?

I socketed Hydrosphere into 4 socketed boots, just to see how it works with my build. I put in Bonechill Support and Hypothermia Support. What I'm questioning is why (when I mouse over the Hydrosphere thumbnail) I only find 1 support effect active.

-With all of the potential support benefits Bonechill and Hypothermia offer, the game only shows-

*Enemies Chilled by this Skill have Cold Damage taken increased by Chill Effect*

When I socket Faster Casting Support with Hydrosphere the effect doesn't show up in the thumbnail, but it does affect the cast speed.

Whereas if I socket Faster Casting Support with Purifying Flame it does show the effect in the Purifying Flame Thumbnail. The same is true for other Support Gems that I socket with Hydrosphere. They apply benefits but they don't list them on the thumbnail. Is this an oversight?