generate-tiles metadata bounds/center incorrect

[NeptuneTheMystic]

When setting the BBOX environment variable and running generate-tiles, it appears that it is properly giving the BBOX coordinates to tilelive-copy via --bounds=, however tilelive-copy (or something it is calling) always uses a bounds of -180,-85.0511,180,85.0511 and a center of -12.2168,28.6135,4.

Can someone confirm this, or am I doing something wrong?