What does it mean when my carb line goes orange instead of green? I'm still at only 19 net carbs but line is orange not green

If I understand things correctly, the line turns orange when carbs are maxed out, and red if they’re exceeded.   That said, sometimes my carb line turns orange one carb early.  The app computes macros down to the tenth (I think) but displays only round numbers, so I think it happens when the actual total (down to the tenths) puts the total over the limit while the rounded number does not.

I sure hope that makes sense!  LOL