1.5x not working

I've recently started developing my own server and I used the gather manager to modify the multipliers on my servers. I'm looking to make it 1.5x
I changed the config and I noticed while testing it out it didn't allow me to have nicely round numbers when farming. On stone I got 1496 instead of 1500, with sulfur I had 449 and I had the same issue with multiple others such as bears, wood, etc.

I'm wondering if there's a fix for this? What I personally think is happening is that each time you hit the node you get around 60, I'm thinking that it tries to round it down in one of those steps multiple times and thats why you get 1-5 less.

I don't believe this plugin is designed to handle decimal rates, you have to go 1x 2x or 5x that sort of thing.

Decimals work.