The deploy multiplier on a node is something not seen. Something behind the scenes. The 2.75 deploy multiplier in the bottom left of your screen has nothing to do with what is happening on a node.
Control points are nothing more than a total of points added together for the points on the nodes you control. On the final flash screen, you cannot see what was deployed on a node, only the points you deployed out, and the control points. What goes on a node is different from what you deploy in the bottom left of the screen.
A gunner is 10000. A gunner in bottom left at 2.75 bonus is 27500. A gunner on a node with 2.75 is 10000. the 2.75 doesnt go on a node. The modifier of up to 5x depending on what the other team deploys as well, is not shown on any persons screen in FL. It is hidden. And my guess would be that it is designed to benefit the team that already holds the node. I am also going to assume that the nodes initial points also goes into the hidden modifier. The Command Center is worth 1000, so your first deploy of a gunner isnt 10000, its 11000, but only on that node, and the 1000 points isnt added to your deploy points on bottom left either. Possibly later in the node battle that 1000 points comes into play with the 5x modifier in some way.