Pill bottles (and the pills in them)

[Spy_Guy]

I've recently noticed that if you create multiple pills from a large beaker of stuff you end up with some extra reagent in them that you definitely did not make.

For instance, I created 50 units of a thing and decided to split it into several 5u pills.
When I later added the pill to a beaker in order to fill up my pen with it, the pill contained the 5u of stuff I originally added as well as 20u salicylic acid for no particular reason.