he said that the problem was that people are constaly over the 1 item limit due to the production values of planets. So the overflow buffers must become bigger than a singe exta item's worth or even infinite. That's what no one is experiencing.
Well, I am very certain that they are not in yet when it comes to research, as more than once I've had like 15 research points to go on something when I am earning 400+ research points a turn and then seen them all that extra research I had on standby get flushed down the drain before the next tech gets researched. Which, yes, would cost more than the 400 points per turn I was earning - so being within 1 unit isn't the problem here. In fact, I don't think I've seen any production being carried over at all from one project to the next/one turn to the next when there is excess.
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To put this in a better way, what some people want (and as near as I can tell, what Paul and co are intending) is if I have 20 research points left over after researching a tech or 5 production points left over after building something on a planet or shipyard, that those points should go toward researching/building the next thing in my queue or tech at the beginning of the next turn.
Near as any of us can tell, this is NOT currently in Beta 4, Patch 2. Any and all production/research points that are "left over" after something is researched/built is flushed down the drain. Even if it is going only to one thing (to stick to the One Tech/One Ship/One Building paradigm). This is a separate concern from the "build 10 things at once" folks. Related, perhaps. But still separate. And I worry that the message here is getting lost between the two separate concerns.
So I want to make sure that the folks who are actually coding the game know that it looks like the what I will start calling "Production Spillover" does not appear to be working as intended.
Now if this is already addressed and in Beta 5, never mind me, as I said. Or, again, if they are aware that this isn't in yet and it is on the TO DO list, fair enough. Never mind me again. I just want to make sure that the "Spillover" concerns aren't being place into the same category as the "Build Multiple Things At Once" ones. 
Good to see! Here's hoping then. 