PHP/Mod-rewrite ERROR FIXES - 2 part project

This project has 2 parts, and will be completed only after both are completed. 1) I have a website written in php that has a large MySQL database and runs on a linux apache server. My google webmaster tools shows a bunch of internal broken pages - 404 errors. I can show you exactly which pages cause this. The problem does not seem to be in database - the records there check out. The problem is likely in the coding. I need this fixed within 24 hours. 2) I also have another similar website where my server somehow creates duplicate sub-pages. i.e. I have many pages in the format of [login to view URL], but in my google webmaster tools I also see [login to view URL], [login to view URL], [login to view URL] etc. (pretty much all letters of the alphabet), and all of these pages are the exact duplicate copy of the [login to view URL] type of pages. From what I understand, this requires a simple mod_rewrite fix with 301's to the correct pages. Both websites have large MySQL database. This is a rush project, I need this done within 24 hours. I am paying $40 for this. If you do this well I will have a lot more work for you. Note: I need someone who is generally available to take projects from me and who can be reached via IM. I am not a patient person and do not tolerate procrastination well. If you have obligations that prevent you from fully completing projects in a timely manner, please do not bid. Thank you all.