Multitouch on Windows offsets touch index by 1, starting at TouchIndex_2

Touch input on Windows devices will start at touch index 2 instead of touch index 1, like other touch devices.

1. Download attached project and extract
2. open .uproject
3. Package project for Windows 64
4. Open packaged project on Windows machine that has a touch screen
5. Touch screen with finger(s)

RESULT:

Touch index always starts at 2

EXPECTED:

Touch index starts at 1