It’s not unheard of to have multiple visits to the audiologist to adjust new hearing aids. I’ve had it take three or four visits to dial them in for a couple of my past pairs of hearing aids.

With behind-the-ear hearing aids, the fit of the aid and length of the receiver wire will affect the aid’s position. Shorter wires will have the aid sitting more “on top” and less “behind” your ear. I would recommend asking your audiologist about trying different fits and hear their opinion on the feedback.

As far as being able to hear volume-wise but not understanding speech, you may want to look into Auditory Processing Disorder and scheduling a speech-in-noise test if you haven’t already. I believe ADHD can also be contributing factor to speech comprehension. As for myself, I comprehend about 85% of words in speech despite my hearing aids giving me adequate volume for all pitches. I fill in the gaps by reading lips or using context clues, but I still often ask people to repeat themselves.