should the liquid come to the top/ cover my beef when making pot roast?!

Do not cover the whole roast. that would be boiling the meat. the liquid is there to help keep the roast moist and add flavor. the cooking method you are using is called braising. the meat should not be covered completely.
If you are cooking the whole roast on the stove top range, be sure to keep the temperature low to keep it at barely a simmer and make sure the liquid does not dry up.

My suggestion to you is that if you have access to an oven that will be the best and safest way to cook the roast without having to babysit it.

A pot roast slowed cooked in the oven is the easiest way.............Boiling meat in general is not the best way to cook it............

That isn't braising meat.......Take it out of the water...pat it dry...add some salt and pepper and put in a roasting pan or baking dish and put in the oven for about 3 hours at 325...put a small amount of liquid in the bottom of the pan...

You can always add vegetables about an hour before it is done.................

Hope this helps....

And for those who do not know what braising is...........to cook (meat, fish, or vegetables) by sauteing in fat and then simmering slowly in very little liquid. ....

Yes, you are braising here. Thats when you cook something partially submerged in liquid. It's a classic cooking technique that works well for tougher cuts of meat.

I am wondering why you are boiling the roast, which may be fine but next time throw it in the oven with salt and pepper add water to half height of the roast

Yes thats fine just flip it over often so that it cooks evenly

Natural cook =)

The water should cover the roast to make it tender.

That's perfect, you don't want to submerge it