I am unsure if this is fixed in the latest versions of BoP or Forge; I am submitting this bug as record for other DW20 players.

Details

• Direwolf20 1.7.10 1.0.3 pack
• Forge 10.13.2.1272
• Biomes o'Plenty 2.1.0.1004
• Tested on SMP, on Survival overworld and Twilight Forest world

Reproduction

1. Plant a Pine sapling from BoP onto a block of dirt or grass
2. Break the block that the sapling was just planted on
3. Observe that both a Pine sapling and Sacred Oak sapling drop

Nice work! Thank you for fixing this.

Update: After some pine trees have grown near other pine saplings in 3 space cross grid, some have randomly turned into sacred oak saplings: http://i.imgur.com/jTT3NC0.jpg

This may be related to issue #304

Edit: This appears to be just a visual bug; the saplings still grow into and drop pine trees and saplings (but this does not affect this bug report)

Had the same issue. Excellent issue description, by the way! ;)