Upvote:8
But now som(e)body told me that the ESTA should only include the "First (Given) Name" but the feature added both of my first names from my passport.
Somebody is Nobody. You followed ESTA website's advice and did exactly what they asked for. They picked up your complete name. If only 1 first name was a compulsion they would have known and enforced. In any case, it is better to have your complete name showing in both your passport and your travel authorization than to have 2 different names because of some naming conventions.
So I used the information the feature auto populated and trusted the information it provided. I filled in the rest of the applicant form and got my ESTA approved.
As you have already noted, their website says :
Using the βUpload Your Passportβ feature will ensure your biographic information is uploaded as it appears on your passport, minimizing data entry errors.
Then it is their system's headache to ensure that the uploaded information confirms to their format, if it doesn't it should generate an error.
I'm not saying you go ahead and argue with them about it but that if this specific thing creates any issue at the port of entry you can explain that you used the feature as suggested by the website and did not make any changes to the personal information after it was automatically scanned by the website.
The information from the passport that the website picked up is the same information that their scanners will pick up at the port of entry, and everything will match.
You're good. Enjoy your trip. I foresee no issues at all.