The line Causes a compacting drawer convert n of item1 into 1 of item2. in the common config
should actually read Causes a compacting drawer convert 1 of item1 into n of item2. if it is to reflect what is actually happening, ie. that item1 is the compacted item and item2 is the uncompacted item.

As an example, if I were to follow the comment and add
"minecraft:nether_wart, minecraft:nether_wart_block, 4" (to add support for Quark and the cheaper recipe it adds), I would get an incorrect result, since the code has item1 and item2 swapped. The actual entry needed is "minecraft:nether_wart_block, minecraft:nether_wart, 4".

Alternatively, it could be that they're swapped in the code for the configs rather than in the comment, if your intention is to have uncompressed first and compressed second.