Never heard of two different tilts. However, if your neurologist did the testing, it makes sense that it is for nerves. The doctor that did mine was an electrophysiologist which is a cardiologist that specializes in dysautonomia. I think you should get a referral to see an electro physiologist.
The title on my reports is cardiac investigations. And the things I listed above in my postings are the seven things I was tested for Regarding dysautonomia.