Resistance vs Hardness

Starting to notice that the Hardness trait get's overwritten or ignored whenever the Resistance trait of a block is much higher, eg when a player wants a block that's easy to break but resistant to explosions. An example would be the Ender Hopper from Dark Utilities, which normally breaks easily with any pickaxe. However after installing BlockTweaker, it took over a minute over harvesting the ender hopper in order to just get 1% of progression.

This is the ender hopper section of the BlockTweaker.cfg: https://hastebin.com/apezirivez.coffeescript

I also have custom made blocks from ContentTweaker which have a high resistance, but low hardness (they're portal blocks, so creepers don't accidentally strand a player). However after installing BlockTweaker, harvesting them becomes much more cumbersome. Was this the intended implementation?