Are you comparing the level when the engine is at different temperatures? A hot engine will show the level at the upper mark and a cold engine it will be lower down.
In any event new engines may burn oil when running in. Don't be shy with it, let it rev to 6000 to bed the rings in and seal them against the barrel. Once past 600 miles slowly increase that ceiling to 8000 over say the next 600 miles. Don't sustain 8000 just let it get up there occasionally.
In any event new engines may burn oil when running in. Don't be shy with it, let it rev to 6000 to bed the rings in and seal them against the barrel. Once past 600 miles slowly increase that ceiling to 8000 over say the next 600 miles. Don't sustain 8000 just let it get up there occasionally.