There's a bunch of different values between your screen shots, so I'll clarify what each of them represent.
- 11.6 $W / m^2K$ for U Factor no film: U-value for only wall material layers defined in the Layers tab inDesignBuilder's Constructions Data window.
- 4.24 $W / m^2K$ for U Factor with film: U-value for combination of wall material layers and air films on interior and exterior surface. More resistance from air films leads to smaller U-value than the 11.6 value above. This is the value EnergyPlus uses in it's calculations for surface heat loss over the simulation. I would have expected this to be equal to the upper bold value shown in the Calculated tab in DesignBuilder's Constructions Data window (3.90 $W / m^2K$)
- 2.93 $W / m^2K$ for U Factor that you circled at the bottom of the Calculated tab in DesignBuilder's Constructions Data window: this is accounting for thermal bridging impacts, such as heat leaving walls through studs easier than insulation. I would have expected this to be HIGHER than the 4.24 value above, since there is less resistance and more heat transfer.
The Envelope Summary Table Report documentation isn't too helpful, but for more discussion on envelope outputs from EnergyPlus, you can read posts here and here.
