probably, or less likely it was a mistake on the ITF's website but for sure there can be mistakes by the ATP when they received documents : they don't do something automatic from the ITF's website as you do, they have other sources
Well, I didn't see ITF making any mistake regarding the class of a Futures event. I've seen ATP making this mistake plenty of times, but they have always fixed it before the "effect" Monday.
Thank you for the comment to the ATP website.
You are right, Mexico F2 is a $15,000. The changes are being made and will be reflected in the rankings shortly.
Rankings & Prize Money Coordinator