Yes, it's the same address. I'm suspecting that someone acquired the name though. I can't say for certain, but Rachel is my ex-agent, and I've read enough of her letters that I can say with very strong belief that this is someone who's being dishonest.
Look, too, at the first blog post: "I am back for blogging, ill be posting content regularly from now. Check back for my updates" It has a comma splice, errors in capitalization, absent apostrophe, and absent period. That isn't something I think she'd do.
Look now at the re-posts of her earlier entries. She uses colons, introductory phrases with correct commas , appositives, and the like. She wouldn't resume her blog w an entry punctuated like the first entry--even if it was merely going to be a series of re-posted entries from before . . . which they obviously are bc she references asking "Nancy" questions, and she hasn't been at an agency with Nancy for almost 2 years.
Personally, I suspect the blog is being used to air the grievances that show up in the replies to the entries.