Yes they still do

If you look at the menu section of photos, the green sheet is the all you can eat menu. The nigiri and the plain rolls might be safe. They don't add soy sauce; you choose to dip. Most nori is gluten free. Rice vinegar that is used in the rice can have gluten, though. The surimi (fake crab) in the California rolls often has gluten. Tempura is usually made with a wheat flour too. You can ask to see what vinegar they use for the sushi rice and make a judgment from there. Good luck!

At least as of a couple months ago, it was $17.95

You cannot split the all you can eat; in fact you may be asked to leave or pay for two orders :) You can, however, have one person order the all you can eat and another order from the regular menu

5 - 10pm Saturday, 5-9 Sunday