Latest version of Botania (r1.5-170)
Latest recommended version of Forge for 1.7.10
No Optifine

The Shimmering Mushrooms do not pop up off the ground when exposed to high levels of light (higher then 9) like the vanilla mushrooms do. (also results in them being able to be planted in any light level)
Proof: http://imgur.com/FhzSExl

how can i make multiple mushrooms from one?

• Good job posting on a 6 year old issue report. Next time please ask questions like this on Vazkii's discord or the subreddit.
• You don't.

Intended.

Ah ok was not aware it was.