What's frustrating with San Francisco is when you're in the US, type it in, and see San Francisco, Agusan del Sur; San Francisco, Cebu; San Francisco, Quezon; etc. pop up before the one in California... like what are the chances that you're in the US and referring to those instead of the one that's actually in the US?
Matches should be sorted by a weighted score that takes both geographical distance, prioritizing San Jose over San Jose appropriately rather than blindly sorting them adjacent.
Exactly, some rules are meant to be broken. If the user is believed to be in northern California and types 'San ', then "San Francisco" should probably be higher up the list than "San Diego" despite that not being alphabetical order.
Determining whether or not the autocompletion should work like this is a matter of common sense applied by the developer, there is no hard and fast rule. In some hypothetical circumstances it may make more sense to sort by population size, rather than geographic proximity (let alone alphabetically.)
