I got a Beseler Audible Enlarging Timer off of ebay. It's in great condition but there is something quirky about it. The dial on the left is whole seconds and the dial on the right is 10'ths of a second. There is also a switch below the dials to use 1x or 10x for the timer. I can set the seconds and the fractions of a second and they seem to be ok, but when I'm doing something like "28 seconds" or "32 seconds" it never comes out right. Example: I turn the switch below the two dials to 10x and I set the left knob to 1 and the right knob to 0 Should I get 10 seconds? I get 12 seconds and I'm not sure why. I'm not ever sure what I should get and I've tried setting some and checking it by the clock but I can't figure the system out. I don't have an owners manual and haven't been able to locate one. Anyone have one of these and can clue me in?