The water in the bowl keep runing after the tank is full.

Troubleshoot Your Toilet Without a Plumber

www.popularmechanics.com/home/how-to/a4117/4303948/

Overflowing, constantly running and sweating toilets can test a home owner's sanity. ... take for granted--until we can't take a shower or make the toilet flush properly. ... If none of the above does the trick, you may have a misadjusted or faulty fill ... the waterlevel a half inch below the top of the overflow tube inside the tank." ...

Emergencies - Overflowing toilets - Toiletology 101

www.toiletology.com/emergenc.shtml

You can't just lower the water level in the tank; you need to displace some of ... and the ballcock and flapper are working properly and shut off when the tank is full. ... The bowl is filled with the water that goes into the overflow pipe. ... Unfortunately, when a toilet bowl is clogged and the water level rises and doesn't flush the ...

if the water keeps flowing then try replacing the flapper if it still flows then the fill tube gasket or tank to bowl gasket need to be replaced.

A new flapper or washer

You say you have replaced seals. I assume that you are refering to the flaper valve that controls dumping water from tank to bowl to flush. To make sure you have a good seal put a dozen or so drops of food coloring directly into tank when it's full and observe for a hour or so to see if water in bowl is discoloring. If it is then you are still leaking there. You can shut off water supply off or flush toilet and manually hold flush valve closed. Check to see if there are any rough spots on flapper seal that could stop flapper from sealing good. If you find rough spot then make sure the surface is dry and sand lightly with medium grit sandpaper.120 grit or finer.
One other thing to check is if your toilet has the plastic or rubber tube that goes from the flush valve into the overflow. Make sure that this tube does not set below water level in tank when it is full as this can create a suction or syphon,
Hope this helps you. Thanks

The water level in the bowl is determined by the built in trap in the back of the bowl. Water is allowed to enter the toilet and it then "over flows" the p trap in the back when flushed. Once it's flowing, it syphons the water out of the bowl. While the tank is re-filling, a small portion of water should be running down the overflow from the small hose clamped onto the overflow This rinses the inside of the bowl, as well as helps-refill the bowl. Be sure that hose is directed inside the overflow tube. To see what the max water level in the bowl can be, add some water from a cup or glass. Once it's full you can keep adding and it won't get any higher. This will be the max level you can expect.

One thing to check though is up in the tank, make sure that the little filler hose is in the overflow spout. It sprays water down there to rinse the sides of the bowl and doesn't stop till the tank is full. If the flushing action draws out more water than it is supposed to, it will not fill up unless that little hose is in there. Check it out.

This description is a little vague, but I will do my best to help. The first question I would ask is. Is this water going down into the bowl? This can be checked by adding a couple drops of food coloring to the water in the tank and waiting a little while before looking for colored water in bowl. If there is colored water in bowl than the most common problem would be a faulty flapper or flush gasket. If no colored water shows up than the ballcock valve may need to be adjusted or replaced. I hope this helps.

The bowl is filled up with the little hose inside the tank, it locks inside of the overflow drain. And runs water in there as it flushes to swirl the water and fill the bowl. Water seeks it's own level, and the level in the bowl is at the top of the trap. It has to hold water, unless it isn't filling or it is leaking. Check out the filler and hope the bowl doesn't have a crack in it. Hope this helps.

Alot of times this problem occurs when there is not enough water in the tank behind the seat and bowl. Lift off the tank lid and see how much water is it, It should be near full.If it is not your problem is not enough water.

"Fluidmaster" makes a device that clips onto the tank and dispenses a solution into the bowl at each fill after a flush.
It goes inline with the tube runing from the fill valve, and dumps into the flush valve which goes into the bowl when filling.

Most LOWES carries them.
These are better than the ones that release the chemical into the tank because the chemical never has a chance of causing corrosion and failure of the tank to bowl seals.