Wirelessly posted (Apple iPhone: Mozilla/5.0 (iPhone; CPU iPhone OS 6_1_4 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10B350 Safari/8536.25)

Global Entry doesn't use the chip; it uses the MRZ strip on the bottom of the ID page.

Maybe our passports just never had the chip activated? (Since USA began issuing e-passports to comply with international standards but doesn't use the technology itself.)