E85 is mostly ethanol. Adding a few more ounces of Heet (which is either methanol or isopropanol) won't do anything.
E85 can absrob a lot of water before the fuel seperates. The ethanol and water mix together and the gasoline portion of E85 separates out and floats on top of the water/ethanol layer.
If this happens, the car won't start when cold. The gasoline is there to give the E85 vapor pressure. If the car is starting and running OK, then I suspect there is another problem going on. Maybe the Flex Fuel Sensor is bad.
If you did actaully get wet E85, then its likely that others are the same station did as well. If it were me, I would pump some fuel out of the engine's fuel rail into a glass jar and look at it. If it's hazy or separates into two layers, it's wet. I'd also buy another gallon from the station and look at it. Then I would talk to the station manager and see if anyone else complained. With the heavy rain we recently had, it's very possible that water made it's way into the underground staorage tank.