It seems like GT is messing up with Forestry recipes in which sand is involved as an ingredient.

Setup:

• Minecraft: 1.7.10;
• Minecraft Forge: 10.13.4.1614;
• IC2 Version: industrialcraft-2-2.2.828-experimental;
• GT Version: gregtechmod-v414.23;
• NEI: NotEnoughItems-1.7.10-2.0.1-GTNH-universal;
• Forestry: forestry_1.7.10-4.2.16.64.

Additional Content:
Logs: log.latest (pastebin link)
Demo: