I have seen the following behavior in "time left" numbers indicated.
When moving sliders around, the "time left" updates as I adjust. Some find that a useful way to apportion spending.
When changing the count of facilities, or upgrading them, the "time left" does not update until the turn button is toggled. I suspect that the algorithm the game uses for that calculation does not update the count and type of facilities during the turn itself, though it may change the number in the equation when it goes to apply it. That is, it updates for display the % of production for the facilities but not the count.
So, if I have guessed right, a slider setting of 75% research on 10 facilities each generating 10 points would display the effects of 750 points, or (0.75)(10 facilities)(10 points per facility). But, if you demolished one facility, the equation for the display would not change to reflect that there are now 9 facilities - being limited to using the value that existed at the start of the player turn. Nonetheless, when the game turn ends, the actual end of turn values would be used.