I am having problem with my LN wallet (RAspiblitz) and while searching for solutions and help. I come across this option which I think  can help you know about output balance differences.

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OP_CHECKSEQUENCEVERIFY

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in one of the discussion at bitcoin stackexchange forum. where the term was clarified.

It basically checks, if an input's sequence number is smaller than the sequence threshold (1 << 31 = 2147483648), and if so, it will compare the nLockTime against the sequence number of the input.

This may give you some insight into the wallet balance output... Hope I am not misleading you, but give alook at that.