That is the hardness of the permeate water? That is not very good performance from the RO system, if it is. You mention membrane softening, so this is probably using nanofiltration membranes and not RO membranes. In addition, I expect that they are blending the permeate with some raw water at the end of the process if they don't need really low TDS water.
The 36 ppm alkalinity seems reasonable for the amount of hardness in the water. Clearly, there would be significant permanent hardness in this case since alkalinity is typically equal to the temporary hardness value.
The water pH is not surprising. Dissolved CO2 in the raw water will make it through the membranes into the permeate and that means that the pH will be driven down. The typical approach is to aerate the finished water through an air stripping tower or cascade aerator to drive off some of that CO2, but I don't know what your plant is like. Don't worry too much about the pH value, since there is some alkalinity in the finished water. That will control the mash pH more than the water pH will.