The tallies to the right of each resource counting workers assigned to gather that resource flicker while the workers are depositing; this makes it harder to tell exactly how many you actually have on that resource at a time.

easy fix, thanks for noticing
EDIT: I had to jynx myself by saying that. Turns out I don't track whether a worker is returning to drop off on the clientside so i'll just consider holding a resource (and not idle) as counting to the total, this should cover most cases since workers are usually not holding resources while doing other stuff.

The logic I'll implement is if they're holding any non-zero amount of a resource they'll add to the total, so one worker holding a bit of all 3 resources will count as 1 of each in the total assigned count. This might be a bit weird, but I don't reckon it will happen very often.