Softails have a problem of Oil going into the motor sump or Filling the motor completely and almost emptying the oil tank. GRAVITY... Not all do this but Many do. My 06 1200 sport R does this in a few days...
Sitting for a few days might lower oil enough into the motor that it will do what you say it is doing.
Especially IF You added oil when only Thought to be low.
IF you added oil, I'd drain it out of the tank and start over AFTER oil is pumped back into the tank (if you added a quart, take out a quart)... The best way to start a softail from COLD with oil in the sump is start and Idle for a minute or two. I like to have the oil cap off and watch the oil return into the tank.
Never BLIP the throttle OR ride off
Until you are sure the oil is Back into the tank. You will see it return.
Checking oil is done also when Hot and done After a ride. FULL Then, IF none is on the floor on Next ride, and LOW in tank at next start-up,
it is in the motor...
Do this IDLE process again when cold started...
NOW IF you added oil when it was IN the engine, filling it up after sitting, You are liable to have the OIL coming out of the breather tube problem you are talking about... Engine Swimming in oil and trying to get rid of the Xtra some how... Not good...
IF Any of this FITS, Get back with your Yada Yada and I will try to Help.
signed....BUBBIE
ADDED: Others read here so this may help them IF Not you...