I was going to suggest the same thing Executioner did. ATF has more detergent in it than motor oil does, just like Executioner I am a little hesitant to recommend it on newer cars as this is an old school trick
My guess would be the engine is starting to devote sludge and the oil is slow to return to the oil pan where the dipstick measures it. After the engine has run for a bit the oil is getting trapped in other parts of the engine and does not make it back to the oil pan fast enough to get an accurate me...
Few things tick me off more than the language issue. 85% of the parents of the kids in the elementary school my son goes to can not speak English. What is even worse is they expect the school and everyone else to learn to speak Spanish rather than them learn English. I say to hell with them