Yes, you can amend the schedules to include new creditors and change the incorrect addresses. You must also amend the summary's, that contain totals from the schedules, as well as the creditor matrix (mailing list). I would suggest you get help with this.
California Health and Safety Code section 17926 requires the "owner" to install the device in your unit.
Section 17926.1 states:
"(a) An owner or owner's agent of a dwelling unit intended for human occupancy who rents or leases the dwelling unit to a tenant shall maintain carbon monoxide devices in that dwelling unit consistent with this section and Section 17926."
The first section requires the owner to install it and the second requires them to maintain it. I do not believe that it...
The debt collector may not have purchased or been assigned the debt. Sometimes they are hired just to do the dirty work and try to collect. You have a very limited time to file your answer and it needs to be addressed ASAP. Contact an attorney right away that works on debt cases like yours.
Sounds like he could be the victim of identity theft. A police report needs to be made. Contact the law enforcement agency that serves your jurisdiction. If that is the case then you must notify the credit reporting agencies as well. He should review his credit report to see if there are any other accounts that have been opened in his name.
Generally speaking, if you get a higher paying job after the bankruptcy petition has been FILED, it will not change anything, especially if you are still below the median. The income used, for means test purposes, is the six months leading up to FILING, not DISCHARGE. If your income changes before filing, then the schedules will have to be amended, but it still should not change anything, assuming you are still below median income. If you have any questions, let a bankruptcy attorney assist...