A. It's not a problem.
B. JR's idea on the differential is worth checking.
C. The less fluid in the kegs, the more the temperature will fluctuate.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk