26-15-13-2-9-5

"26-15-13-2-9-5"
This is the code Zomboss gave to me via YouTube PM. At first I couldn't seem to figure out what this means, but after some further investigations, it translates into "zombie". That's right, zombie. However, I don't know why he sent me this. When I asked him, he just said "You'll figure it out later, http://www.zombosslosthisrightshoe.com/-18". I don't know why he also sent me that link, but the domain name is quite funny "Zomboss lost his right shoe". What? However, the site doesn't actually exist. -18 is the result of subtracting the above code.
Soon after, Rachel called me. I picked it up, but I replied her that I'm too busy right now.
I started a Facebook chat to him, asking for what this code is for. But he replied "1-800-261-5132". 261-5132. 26-15-13-2. That's the first 7 numbers of the code. ZOMB? ZOM-B (pronounced zombie)? And why is it a toll-free number?
I immediately called the number, and Zomboss answered it. This is the transcript of the call.
Zomboss: Hello.
Me: Hi. What do you want from me, ZB?
ZB: Put that [password] into my Google account, zomboss[omitted for privacy reasons]@gmail.com.
Me: Why should I do that?
ZB: Just do it.
Me: Why would you want me to do it?
ZB: JUST DO THE DAMN THING, OK?
Me: Well, OK, if that's what you want.
(A break, I was logging in to Google using the information he gave)
Me: OK, Logged in.
ZB: Now go to Google Drive.
Me: I know what you want. Uploaded some scary s**t there?
ZB: Well, just open it.
Me: OK.
(Opens Google Drive, and found something)
Me: OK, so I found a file there. It's called "ZBDiary-111915.docx". Your diary?
ZB: You guessed it. I want you to download it. Use the password I gave.
Me: OK.
ZB: Now open it. Use the same password.
Me: OK.
(Opens the file)
Me: What the f**k? You want me to read this?
ZB: Yes. I want you to know what's going on now.
Me: Well, OK. [the content is too long to fit here. Here's the content if you wanna read it.]
ZB: Got the point?
Me: WTF is this? Your life is RUINED? Why?
ZB: I know. I want you to read it, because of THAT. 
(phone hungs up)
I still couldn't figure out what's actually going on, and he doesn't respond when I try to ask him.
I believe that he's somewhere, but not the place I know.
It's still a mystery now, but one day, it'll be revealed.
And about that "lost his shoe" site? I don't know about that either.
==Update: Possible meanings of that site==
OK, so I think I figured out what that site means. Last month, he bought a new pair of shoe. I think it was a Nike. The point here is that he might have literally lost his right shoe, and that's why he put that nonexistent site there. I think he's desperately finding his right shoe now, and probaby that's why I can't contact him.
There is another possibility why he sent that URL. As far as I'm aware, most of the zombies don't have right shoes. When I asked them why, they said that Zomboss took it away from them. Well, I think they did a revenge: They took away Zomboss's right shoe and put it somewhere. But still, the exact meaning of that site is unknown.