High DHT at low T: how can this be?

My testosterone level according to the latest measurements is 14 nmol / L (normal values are 8.3-30.1) while DHT is -733 pg / ml. And in previous measurements it was more than 800. I read a lot of topics on the PFS format, but still I can’t understand how, with a relatively low level of testosterone, I get not a small level of DHT? Who can explain? I would be glad for this, only the high level of DHT does not give me any positive aspects in muscle building,testicle size, erection and libido. But he gives negative moments killing my hair further and affecting the prostate.

What are the values for DHT

Last year, the normal values at the laboratory were 250-990, this year 175-1204. However, at the end of 2018, I passed the first test for DHT and it was 913 at a testosterone level of 12 nmol / L, and this is the lower limit for T