There are some quirks with some of this.
1) It looks like some items you can find but "disappear" if you edit the value until they're restored to the original value. weapon crates and the good grenades, for instance. I followed the same process, 0.08 on 2 weapon crates, dropped one, refine for 0.06 and as soon as i changed it (i tried just 0.08 again) it just vanished from my inventory. when i replaced it back to 0.06, it was back. I noticed a similar behavior with some vehicles found if i was trying to do a search on all single items, mass changing the values.
2) when doing a "replace all" method for single items and changing all 0.06's, a fair amount of items do not increase. (steel axes for one but a bunch of others including welding rods, electrical cables) Once I had 2 items, it worked ok. Quite weird. I'm wondering if some items store in a different pattern versus ::13