Mouse X and Y input axes don't work with touchpad

From what I saw yesterday, if I swipe from back to front, I get this:

[2016.04.29-04.18.52:340] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1268.005 Y=738.986 Z=1.000
[2016.04.29-04.18.52:356] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1266.005 Y=738.986 Z=1.000
[2016.04.29-04.18.52:374] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1266.005 Y=739.986 Z=1.000
[2016.04.29-04.18.52:391] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1264.006 Y=739.986 Z=1.000
[2016.04.29-04.18.52:408] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1262.007 Y=739.986 Z=1.000
[2016.04.29-04.18.52:442] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1261.007 Y=739.986 Z=1.000
[2016.04.29-04.18.52:459] 0]LogBlueprintUserMessages: [FirstPersonCharacter_C_1] X=1247.013 Y=738.986 Z=1.000

If I swipe from front to back, I get something similar, where X goes from larger value to smaller value. So when I compare it, direction will be indistinguishable, since in both cases value goes from larger to smaller and is always positive :confused: