2003 Escort

The rad cap sounds like it is doing its job by releasing pressure into the overflow bottle. Then the bottle overflows and thus on the ground.
My issue is the overheating. I am afraid you have damaged the head and/or gasket from the overheating. You need a shop to do a special test that is called a leak down test. It will confirm the integrity of the head gasket. I think you will be looking at the gasket being damaged. It is very expensive repair, that is about 1200 or so depending on the damage.
After this is repaired, you still need to find the reason for the overheat. Remember, this is a result of the overheat, not the cause. It may be the thermostat, water pump or a clogged radiator.
In the meantime, I suggest you not drive the car until you repair it.

Roy