I have an L6060 (3.5 years old now) with 3/all float valves. All three valves have the float detent when pushing the lever forward. Each moves easily forward and reverse, and don't take much force to go into float mode either, but enough you don't accidentally float when you don't mean to (maybe once or twice ever for me).
Depending on how the tractor was acquired, valves could have been factory or dealer installed. In my example, I ordered with 3 floats. The dealer was able to transfer it from another dealer still in the shipping crate so I didn't have to wait on factory build. I tested it after getting home and found only remotes 2/3 were float and 1 was not. Dealer tech told me that's how it is and that you couldn't have a float in #1. I argued, and they took it back and replaced it. Kind of frustrating they didn't actually replace what was there, even though I paid extra for the floats, until I raised a stink about it.
Also, all three remotes leak down over time. I see it in my top and tilt kit, especially with heavy attachments. I can't leave the tilt cylinder connected with my 8' 3 point brushhog. It will drop down in 15-20 minutes or less. I can set the angle I want and disconnect (As you see in the picture below) and it holds fine. The dealer took it back, replaced a couple remotes and had the same issue. They tested another L6060 and saw the same thing. I never did get a fix other than disconnect.
The remotes on the Grand L are different than the M. The outlets are remote from the valves. Check and be sure hoses are connected correctly. You can fairly easily remove the plastic cover over the levers to see linkages and check those as well. (I put in a new radio, speakers, and powered subwoofer under the air ride seat, so i've taken those apart a few times, haha). Let me know if you need any other pictures or info, and I'll do my best to get what I can.