Need some assistance with proper settings…

I am having an issue and I am not sure how to correct it in term of settings,…

The issue is:
No problem using the tape measure tool to make guidelines at user-defined distances and measurements.
Issue happens when drawing actual entities like lines where I select a point which is the start point and say move along any axis and then select 10’ per se, what I end up with is a line in the direction I cast it in and then a second line which is 10’.

All I want to do is select the point and direction and have a single line the defined length which I have entered.

Any ideas on what settings I need to adjust in SketchUp for iPad?

Dana