Hi admin20,
The format is pickerWheel:scrollToIndex(column_index, position), using 1-index. So if that second form you pasted (pickerWheel:scrollToIndex(1,2)) does not work in your code, i can only think in a different way you write the configuration code for the picker wheel, because i just tested this in multiple ways against 1093 and it works.
If you look at the sample code for the Widgets on git (https://github.com/coronalabs/framework-widgets-sample), file tab3.lua, does your picker wheel initialization code looks different?
Thanks,
Alex