Hi.I am trying to use the invisible seam join on putting my two mofits together .The mofits are from this pattern

http://com.yarnspirations.pattern-pd...bags.en_US.pdf

I am using this youtube video


But i need help understanding what she means by starting with chain one (that makes up the corners) or does she mean at both 2 chains on the corners of the mofits and the end?Whats the first chain on the 2 chains of the corners epesically when you have to turn to the wrong sides?

I have tried going through one of the chain on the corner and their is a gap or slop down between the mofits where you join the mofits (the corner)?is it suppose to look like that? i know how to do the rest of the join but i am having trouble with the corners

i hope that i dont confuse you guys.

Here's a link to the pattern view with a pic of the bag
Granny Square Bags - Patterns | Yarnspirations