New 29' travel trailer dog walking

Thank you all for your input. It is a brand new 29 foot Gulf Stream Innsbruck, bumper pull. I have not hit any curbs and I noticed it immediately after picking it up, on the way home with it. I called them immediately and they said they would contact Gulf Stream for instructions. No response for a couple weeks until I called and lit a fire under them. Now it's over two months of dealing with this issue. I pull it with an 07 Yukon and I pulled a 29 foot Jayco Jayfeather for 7 years without this condition. Pulled straight as an arrow. Same towing equipment and same mirrors. The dealer eventually (FINALLY) got measuring instructions from Gulf Stream, and the measurements came back with several measurements up to 1/2 inch off. I asked for Gulf Stream's instructions on what to have done, and they had the dealer re-measure, and guess what. Everything is perfect this time, no problem. I took two videos (taken while driving, through the rear view mirror) and sent them today to the manufacturer of the frame and axles, and should hopefully hear back tomorrow. We've gone camping only twice, and only 60 miles from home, and it seems to pull OK, but I'm worried about the tires wearing, or even overheating, and blowing prematurely. And taking out the wheel well and trim in the process. I welcome any ideas. Do you think I am overreacting on this?