Echocardiogram image questions - left ventricular hypertrophy

I am a 64 year old woman about 5 feet and 100 lbs, physically active.
I had an echocardiogram in April 2025 and it showed that I have mild LVH with posterior wall of 1.1 cm and septal wall of 1.2 cm. My relative wall thickness was .67 due to my left ventricular internal dimension diastole of 3.3 cm. Cardiologist stated that it may be from high blood pressure, sleep apnea or athletes heart. He ruled out number one and I had sleep lab test. It showed negative for sleep apnea. I had to stop all exercises except for gentle walking up to 3 miles daily with heart rate below 90 for 3 months to be retested.
Yesterday, I was retested by a different sonographer. This was a follow up to see if my posterior and septal walls have decreased based on lessen exercise. She showed me the echocardiogram (from April 2025) image of my left ventricle and said it looked "squished" and said the posterior wall and septal wall may have been read as thicker than it could be based on the image.
She told me my heart looks healthy and my left ventricular posterior wall and septal wall are both 1 cm. She also said she got clear images and that she was able to visualize my aortic valve and right ventricle which the previous sonographer was not able to do.
I am now wondering if I really did have a normal heart without hypertrophy to begin with as the image was squished. Also the technician for the April 2025 echocardiogram did not have me change into a gown. I unbuttoned my shirt part ways for the transducer. I also ended up off the pillow holding my head up for most of the echo whereas the one from yesterday had me in a gown and I didn't end up off the pillow. She would help position me for accurate images.
I guess the question is could the posterior and septal wall decreased based on athletes heart or there was no mild hypertrophy to being with.
Any comment would be appreciated. Actually I thought that 1 cm for 64 year old woman is just off the normal slightly depending on what you read.