I just had 10 pallets of Bermuda sod installed in my front yard. This is my first time having sod or nice grass really. My problem is that after it was all said and done I noticed that about 40% of the sod squares are different than the rest. They are a dark green and very healthy looking, the rest are a lighter green and not so great looking. My invoice said that I paid for 10 pallets of Tifway 419, and that is what I was told that was ordered and what I wanted. I am thinking that I got a couple of pallets of Tifway and the rest common bermuda. The lighter green sod is starting to get a lot of seed heads on it and the dark green sod doesn't. I am right or not. Do I have some Tifway 419 and the rest common bermuda?