I just finished listening second time to the podcast for pages 26-42, and I am also on page 51 of the book, and I think we are on correct track regarding the themes which Weer is evoking so far.
The below images keep on repeating itself
1. Fairy tales
2. The color red.
3. Old Nick
4. St Brendan's Isle
5. Irish connection
The fairy tale connection is becoming stronger and stronger with each section, and we know for the fact that Weer liked to read during his younger years, and he seems to be influenced by them a lot because he is always trying to go to a place which does not exist, and trying to tells us about the purity and perfectness of such places.
St Brendan's Isle is such place which he takes to at the start, the second fairy tale connection is again the name Mab which you guys pointed out literally means fairy queen.
There also seems to be an Irish connection with the fairy tales with St Brendan's Isle, and also Hannah's step mother being Irish.
The color red also keeps on poping up time and again, and Weer also associates the Bold sister's with the color red.
This old nick is a fantastic pick, because we have something coming up in the next section, which again will be invocation of this in literal terms.
Also you pointed out correctly that Weer is supposing a lot of things which he has experienced in the past based on his present prejudices, and he himself tells us that, and still goes on to do it time and again.
Especially the gift swap is perfect example of it, because as you guys discussed, it may be that grandpa is just trying to express gratitude towards Mab for taking care of him, but Weer, interprets it as per his convenience.
Also we get discussion about lot houses which Weer visited as child, and he seems to be associating each house with a specific set of memories, and again this is going to come up in the next section, and we will get a very specific imagery about it.