Question: Silhouette Special HT

I bought a new silhouette HT special online about a month ago. From new there was a slight buzz on the bottom E string. I thought that it needed time to settle down and would improve. After a month it was no better so I checked the set up and renewed the strings using EB super slinky 9’s. The neck relief measure 0.010mm at the 8th fret under a very good straight edge and the string height was about 1.5mm. I increased the neck relief to 0.020mm and raised the low E string to 2mm measured at the 12th fret. Now, the bottom three string all buzz in fretted and open positions.

I have many guitars and have always carried out the setups without any of these problems. can anyone help?