I was just going by the numbers you gave above.
If you look again at your test results graph posted a page or two back on 1 Sep, you can see the same thing allowing for margin of test accuracy and all that. Starting at stated 50% (230AH) it ran for two hours at 80,(160AH) then tapered.
So 230 plus 160 = 390 and 390/460 = 85%. It will taper near there, probably a little above 80%, no matter where you start (just how it is with battery acceptance) so if the 80a run was for an hour, you were 80AH back from say that 390 or at 310AH and 310/460 = 67%. somewhere mid-60s.
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EDIT using Trimetric 96% for input allowing 4% for heat, doing that over you get 230 plus 96% of 160 or 154 so at 384/460 = 83%
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If your actual numbers were different, no matter, as long as all the numbers "go with" each other more or less. It is confusing when you report numbers that don't "go with" one another--eg voltage vs AH.