Trailer tires flat but are not?

Headed south today on I-15 in slow California traffic, I had a lady in an RV yell for my attention and said what I thought she said was my right side trailer tires was going bald. I looked back and thanked her. Pulled over when I could but everything looked fine. Was only 15 miles away from the TA so I kept going but kept my eyes glued to the tires.
Made it and looked again. Tires were still inflated (company has the auto inflation system) but both outside tires had rub marks all the way around on the sidewall.
I'd assume this is due to low inflation but the trailer wasn't pulling at all and the tires are still up.
I'll check in a bit to see if any air leaks out in the meantime.
Any other ideas?
I'm also maxed out on weight. Maybe that side of the trailer has a little more weight on it compared to the other side?

 

Just walking back from getting food and that's what I thought too. Maybe it was a ruse and a driver before me ran the tires up against a curb. She was cute too lol

 

The light didn't come on the corner. Forgot to mention that. And there was no air leak
And yes I do have a tire gauge. But with no leak and other issues, I figured the tires were still fine