Thanks for posting and trying ou the Multi-Axis Additive Manufacturing.
There are many parameters that help determine how many passes are made when doing a part. Even if the part thickness is the same as your bead thickness, things such as percent overhang, percent stepover, etc can cause extra passes to be made. Generally, to force one bead, the use of one of the thinwall functions is the best option.
Looking at your picture of the deposition, what type of deposition are you doing Powdered metal, wire arc welding or something else? The picture looks like too much heat is being applied to and held in the thin portion, causing a lot of deformation. You may need to adjust the recipe on your machine to put less energy into the system, and also increase the cooling time in the operation.