Not merging with Chisel glass properly

[Lethann]

MC 1.12.2
Malisis Blocks 6.1.0
Chisel 2.0.31

First off, when you use a chisel styled glass it doesn't render the block underneath like it does with normal glass.

Second, when placed in the second slot it doesn't merge properly. The middle glass in the screenshot below is "Wood planks & Glass(light)". Note that the entire top is the plank texture.