Seriously, why are they making so many errors on a legal document???! That is just ridiculous. They need to get their act together!
It probably won't be a problem, but the end decision is up to the cic vo. Since there are so many errors, I would start the process of fixing these. I know you said it is time consuming and expensive, but seriously, they should be fixed. Sorry to say I wouldn't be surprised if the Philippine government was doing this on purpose to get more money. They probably do it a lot.
Submit your application with the certificate as is like I said before with an explanation and photocopy of your mother's birth certificate. You should consider fixing the document though for the future, for yourselves, and this way too if by small chance it is questioned by cic (doubtful) then you can show the paper work that you are going through the process to fix the Philippine government's mistake!
It probably won't be a problem, but the end decision is up to the cic vo. Since there are so many errors, I would start the process of fixing these. I know you said it is time consuming and expensive, but seriously, they should be fixed. Sorry to say I wouldn't be surprised if the Philippine government was doing this on purpose to get more money. They probably do it a lot.
Submit your application with the certificate as is like I said before with an explanation and photocopy of your mother's birth certificate. You should consider fixing the document though for the future, for yourselves, and this way too if by small chance it is questioned by cic (doubtful) then you can show the paper work that you are going through the process to fix the Philippine government's mistake!