The way I understood it was that Roland and Eddie were expected to go to the writer, because it was such an important job, but that is why they swapped roles and wanted to go after suze. To catch who ever would interfere off gaurd... but the door whether it be ka or w/e, decided they were wrong and switched them back...

So basically to me, it was a fluke... if Pere and Jake ended up at the general store, like they were suppose to, they would have run into balazaar's gang anyway.

I have no idea if that is right, that is just what i think