Put the tubes in one at a time and see how one tube biases, then the other. Obviously if two tubes are to bias at 60ma, then one tube should sit at 30ma. If both tubes are just that hot, we could modify something. But if one tube is doing most of the current drawing, then you have a bad tube. You shouldn't have to change anything to use the tubes.
Also try one socket, then the other. to see if there is any difference in the amp between them. And if there is, then start looking at voltages around teh socket - particularly pins 4 and 5 - screen B+ and bias voltages.