I ran into the very same issue with my friends phone today. Stock Lollipop 5.1 was installed and the bootload was 0x0007. It was the 4G release.
Anyway, I did the unlocking crap with their website: Every time, I got the "not eligible" message. I did copy the text from console, put it in Notepad++, removed the crap (bootloader) and spaces and converted it to a oneliner. Nothing, nada, it just didnt work.
I tried Firefox and crappy IE. It made no difference... Finally, I just copied it from the console, inserted it directely into the input field of the website, removed the unnecessary text like advised and BOOM it worked. I have no clue how that made any difference, but apparently it did. I even copied out the text of that input field and compared it to the one i created in notepad++ just minutes ago: It was identical.
Bottom line: If this doesn't work for you, just try and try again. The website is apparently broken and unreliable and just sometimes works for some of us!