I've just been to have a look at my Job CPE2 with lift, which I use with a 1500 tank. I haven't previously experienced the problem mentioned here, but I can see that there would be a problem if I tried to lift the tank UP. I lift the tank TOWARDS ME horizontally and then up once it's clear of the unit.
Yes, this makes sense. I figure Jobo wants us to move the tank in something like 45 degree if you see from the side. So it is inside and upside, at an angle.