This week brought news of more trouble with Florida’s school testing system. It’s been a familiar refrain this spring: Students across the state sit down to take a computerized test mandated by law, and they can’t log on. Or they can, but then they get logged off. Or something else goes wrong and the tests are tossed. Most of the issues have been blamed on the state’s testing vendor or cyber attacks, adding fuel to critics who say the state rushed into a new system. And all the technical problems come amid philosophical objections to the testing, which parents and local school district leaders say put undue stress on students and assess little more than their ability to take a test.