New to me 2017 2285 axel questions

[Tanklesstech]

Hi all, I am getting ready to pick up a new to me 2285. The sole owner bought in October 2017 however the placard shows manufactured September 2016. Question re the tandem axles.. Upon doing my inspection I noticed arches in the center of each. These are Nev R Adjust - torsion style. Please forgive my ignorance in not knowing what I'm talking about just yet. See pictures and the question is simple, is this normal? Tyvm

 

[10thtp]

If the arch or bow is on top, that is by design. It gives the empty trailer tires a slight tip in. As the trailer is loaded the weight will force the axels to level out putting the tires in a vertical alignment.

 

[Tanklesstech]

OK, understood thanks. And yes the bow is at the top equally on both.