Hi Again
Since the system runs okay when you remove the seats and the fixtures, it indicated the system is okay. I would like you to install the fixture only (NO SEATS) and run the same test.
I do not want you to change the abort limits. If the same test was running okay before, it means something has changed. You must check and verify that when the fixtures are installed, they are properly secured to the mounting table. Check the inserts in the table and make sure they are still okay. Check and verify the bolts you use to secure the fixture are not too long. Also do the same for the bolts you use to mount the seats to the fixtures.