Yes, the "calculation" for the HSA calculation (your 6,533) in the HSA interview should be ignored, because it assumes that even though you are under the Family plan, that you don't have a spouse with whom to share the contribution limit. So this estimate is wrong (NOTE: only the estimate displayed in the HSA interview is wrong - all the numbers on the 8889 are correct!).
It seems likely that the $1 is due to a rounding error, although it seems due to a lack of rounding. It seems that TurboTax is adding $1,383. (rounded from 1,383.33334) to $2,766. (rounded from 2,766.66667) to get $4,149. Yes, I am ignoring the $1,000 because it is not causing the rounding error.
The reason why only one of you is getting this $1 in excess is because the Family HSA contribution limit is shared, so that one of you gets an extra dollar at the expense of the other.
At this point, I can't think of a way to fudge the input in TurboTax to make this excess amount go away. I suggest that you just pick which HSA is the "loser" and withdraw the $1 from it so you can continue with your return.
P.S. If you have the CD/download version of TurboTax, you could go into Forms mode and edit the 8889-T or 8889-S to change the annual HSA contribution limit; however, this has the downside of voiding the tax accuracy guarantee - this may not be worth $1 to you.
@epete
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