The margins of the chapter say "volumes 2 and 3 will drop together".

Yes - that's the printed volumes I assume. Volume 1 was chapter 1-5, so Volume 2 and 3 will cover chapter 6-14.

Sadly I just confirmed it with getting vol 3 raw. Vol 3 covers 10-14 so it looks like this is the end :(

So on twitter they are saying that vol 2 and 3 are releasing the same day when chapter 14 update was made. Any they also announced on the 3rd of October that vol 2 and 3 are released so is there a vol 3???? They could have vol 3 be a post story in the future. Time to dig a little deeper