The en-au in the middle of that address is because I'm in Australia, feel free to change it to en-us or en-uk etc as needed, I'm not sure it makes a difference for this.
Regarding wordpad not properly identifying text attributes like Italic, what version of Windows do you have again? I've tried in the regular stable build of Windows 10 and in the latest fast insider build (15007) and NVDA (2016.4) identifies italic etc
text in the middle of a line correctly. EG if I type:
The quick brown fox
and italicise the word "brown", NVDA reads:
The quick italic brown no italic fox.
It does this in Wordpad, Word 2016, Jarte and LibreOffice.
Note that you need to have NVDA's document formatting set to report text attributes (for italic). Press NVDA+control+d to get to that screen. If you don't have that set, it won't identify the text as italic regardless of where it is.
The only place I've seen behaviour similar to what you mentioned (if the start of a line is italic thinking the whole line is, and not seeing it at all if it's in the middle of a line), is if part of a cell has different formatting in Excel.