Sally Melville pattern problem

[cabacon]

Hi everyone: new to forum with question: Pattern book is Book 1 the knit stitch by Sally Melville. Page 124 pattern needed in xxl for large lady. I have gauge of 5 3/4 st. per in by calco for my gauge on 8 needles.
xxl = 33" for man yet diagram on page 126 only shows man;s large of 23.5 inches.
where do you increase underarm, 2x10? then how do you fashion underarm sleeve?
Cast on at neck lists for ALL sizes 35 sts. this seems strange that the childs size and the large man would have the same number of casts on for the neck? visited with experienced knitter and she suggested I ask someone else so here I am.
all help appreciated.