Ah ha! I should have clued in, but I didn't realize that your WDH was hooked up for this. A WDH will have a multiplying effect on the tongue weight. So, if you removed 60 lbs, the tongue has 60 lbs less on it. Then the WDH transfers more weight off the tongue meaning that more than 60 lbs is removed from the tongue.
I don't see the multiplying effect to be as much as 120 lbs, but you did say that you removed the bikes as well, so that may make up the difference.
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