GDG- Maps of Gettysburg: Question over Caldwell's route

[Alan D. Brunelle]

Received /my/ copy of the book yesterday - it does indeed look fabulous. 
The first thing I looked into were the maps corresponding to the Peach 
Orchard action, and then looked at the Wheatfield ones, and noticed 
something that looked strange to me -

I was under the impression that Caldwell took his division into the 
Wheatfield from the northeast of that area (forming in Trostle's woods) 
- yet on page 169 (map 17.3) it shows his division coming from the 
/west/ via the Wheatfield road (looking like the division came down the 
Emmitsburg Road and took a left onto the Wheatfield road).

Has anybody any thoughts on this?

Thanks,
Alan