This chapter seems to be lacking proofreading and QC. Syntax is a mess in much of this one. Hopefully we will see a v2 later. I know you can do better than this.
Also, the watermarks were god awful.
The flow of time between the two worlds is probably some thing like one year on Earth is between four and six years in the other world. So if they take a week to get back to the other world, 1-1½ months will have passed there.