Factorio Forums

It seemed to be a bug when I grabbed the resources from a chest a few times and whenever the text appeared saying the number of resources I grabbed (in this situation coal) the number saying the final amount after grabbing is wrong. In this image it appears 32 instead of 20. When I mined coal instead of grabbing from a chest it appeared right.
I am running it windowed and the win32 version.

EDIT: If I continually click ctrl+left button on the chest the difference from what I have in the end from what it shows gets down to +1, showing per example (8) when I'll have 7

I'll confirm this lol I think I noticed this when the flying text was first introduced and got distracted so never actually reported it

I think this is because it is counting what you picked up twice for some reason, perhaps ctrl+click calls another method to add the items to your inventory and both methods increment the counter for the flying text (just a guess).
in your example you probably had 8 and picked up 12 = 20 but the game then added 12 to the total again, thus displaying 32

And so that also explains why if I do it continually it gets down to only one plus...

Thanks for the report, this is fixed for the next release.