more than one double quote problem

[Freire]

While they appear to be the same they're not, the double quotes used for string are straight ones. The "double quotes" you see in shift-9 are a bit angled and are meant for seconds in the Degree°, Minutes′, Seconds″ typing.
Single Quote: '
Minute: ′
Double Quote: "
Second: ″

Hope it's clear now ;]