Incorrect calculation in a repeat?

[SimranArora2]

With the same calculation formula, Survey123 is giving me different results.  Below is a screenshot of my xlsform showing my calculation for the intercept field.

This one shows the correct calculation for intercept field. 

The incorrect calculation shown below.  The intercept number should be 0.7 not 0.69.

[ClaireInbody1]

The sum function in this repeat will sum all the transect together. I believe this is why you are getting different answers.