Stuck With Archiving Old Facebook Chat Messages

Hello everyone!
I've started archiving a conversation from facebook, only specific parts (some rp chatter, trying to summarize the story and save related images, so it means I have to read through it again, only copying the parts that I need). I was using the mobile facebook page (so I can set the link to specific parts and continue where I left off) and it worked well until yesterday, whereas I can no longer open the page where I left off. I can open up the conversations where they are currently at and can jump back with the menu buttons, seems like the new links got a random generated so-called gfid=*.* parts or something which is missing from the old saved address so now I can't open it or modify the number to return me to an exact post. Any ideas how to fix this or perhaps better a better method for it?