What kind of turbo and center section? If its an ebay brand, im sure its material quality related.
I had a seal blow in my Master Power T-70. They are known for this problem but the cause is from too much oil pressure in combination with a weak/thin outer seal. If too much pressure is in the center section, and the drain is insufficient, there will be pressurized oil in the center chamber causing it to push the seals out, allowing oil into the hot side of the turbo. A rebuild or new center section will fix your problem. Then contact the manufacturer and see if an oil restriction plate on the feed side is necessary.