AutoLap vs Lap button press

Hi

Is there any way to differentiate between those two ?

The problem I have: When lap button is pressed I round the distance to the nearest kilometer. When pressed again

within 30s it resets this offset and distance is the original one.

But, when I for example press at 8.05 the lap button and then 20s later, lets say at about 8.10 kilometers, the offset is reset

but then I get a Autolap every XX.10 kilometer. And then at the next autolap it sets the offset again.

Is there any way to prevent that ?

thanks 

regards

Erich