Not good for close archery ranging needs - Vortex Razor HD 4000 7x25mm Laser Rangefinder

I must say that I could not been more disappointed in Vortex. I decided to buy the top of the line Razor model with the belief that it would perform better than the Viper, Diamondback, and older models like the Ranger 1800. I could not have been more wrong in regards to archery distance type ranging. It does amazing at longer distances, but does horrible at closer distances. I went to a 3D archery shoot last weekend and got to really use it for the first time since buying it. On the 4th target there was a deer setup behind some tall grass. You could clearly see the vitals, but there was a fair amount of grass in front of it. My wife used her Ranger1800 to range it at 38yards with no issues whatsoever. When I used this new Razor4000 it came back with a range of 25 yards, it was clearly picking up the grass and not the target. I then put the rangefinder in Last mode which is supposed to give you the range of the furthest object while scanning. No matter how many times I tried or where I moved the crosshairs on the target it came back with the same reading 25 yards. It simply was not capable of ranging the target through the grass. My wifes old Ranger1800 had zero issues seeing through the grass to the target. The long range capabilities of this rangefinder are impressive, but it comes at the cost of performing very poorly at closer distances when dealing with obstructions as minimal as blades of grass even when using the Last mode which is exactly what is meant to be the cure for that scenario.
Needless to say I will be sending this back for a refund and buying the much cheaper DiamondBack2000 in hopes that it will not have the same issues. If it does, then I will send it back too, and begin looking for an older Ranger model that actually functions well for both archery distances, and most rifle hunting situations too.