What dead tests would you carry out during periodic inspection and testing? Insulation resistance is the only one I would do (assuming that the installation could be de-energised for the test) and would not be with individual circuits but the installation in parallel as required by BS7671. I don't see any reason to be disturbing connections in the DB - although I would be checking tightness of terminals.That would be your choice but on the same note I wouldn't omit dead tests because they are incorrectly ordered unless wired in singles that would need a bit of time to trace out, like I said, it takes no time at all given your already doing dead tests to just correct the order and it comes across in a positive light when you pass on to the customer you have resolved one of the issues, to me it makes good business sense and it's little things like that that gets your name out there.. I have never needed to advertise in my 10yrs self employed, I would say that that is partly to do with my business attitude and professional approach, I not saying you are wrong here so don't take that from it, I just find my approach works very well.
Correcting any defects is not the purpose of periodic inspection and testing and is not something I would do. It would be quoted separately as a completely separate job.