Unity 3D and AR Expert required

We are trying to build a measurement app using Unity and AR. Right now the code is done to create the measurements but the anchors do not fall on the same plane as seen in the image. So the exported png looks skewed.

We need someone with prior experience in Unity AR who can deal with 3D math to fix this problem. Connect immediately if you can actually deliver.

Casual enthusiasts please do not bid as this is a priority job.