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If you are running 10% ethanol pump gas your ideal AFR is 14.1 to 1.

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While that may be technically true you can only use that info IF your wideband system is SET with a 14.1:1 stoich value. If your system is set to display gasoline stoich of 14.7:1 you can still use 14.7 as a stoich value when reading the numbers displayed regardless what fuel you're using.
Wideband systems measure oxygen presence and produce a variable numerical output value represented by the Greek letter Lambda. The value for Lambda at stoichiometry is 1.00. If the wideband system user sets the device to display s stoichiometry value of 14.7 (or any other number) the device simply multiplies Lambda by 14.7 (or whatever number is used). This does not change anything about how the device makes the measurement and the device does not care what fuel is being used.
Whoever created that chart was well-meaning and technically correct but has created a communication nightmare where now people can't disuss AFRs without stating what stoich value the reading was taken with (and requiring math to convert to ones familiar scale). It would be much better if everyone just used Lambda (1.00) or 14.7, regardless what fuel is being used. The wideband system doesn't know or care.

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