EDIT: See this thread for a possible fix.

 

What's the logic behind Rocksmith dropping some words in a marked lyric line onto a new line?

 

Why does this:

 

http://i.imgur.com/FfSZANZ.png

 

Become this:

 

http://i.imgur.com/NISWTrk.jpg

  <vocal time="54.735" note="254" length="0.374" lyric="But"/>
  <vocal time="55.112" note="254" length="0.375" lyric="one"/>
  <vocal time="55.490" note="254" length="0.374" lyric="day"/>
  <vocal time="55.867" note="254" length="0.374" lyric="the"/>
  <vocal time="56.244" note="254" length="1.129" lyric="sun"/>
  <vocal time="57.376" note="254" length="0.375" lyric="will"/>
  <vocal time="57.754" note="254" length="1.129" lyric="shine"/>
  <vocal time="58.886" note="254" length="0.372" lyric="on"/>
  <vocal time="59.261" note="254" length="0.939" lyric="you+"/>

While this:

 

http://i.imgur.com/jUGlKga.png

 

Becomes:

 

http://i.imgur.com/IpEPaMb.jpg

  <vocal time="115.433" note="254" length="0.373" lyric="One"/>
  <vocal time="115.809" note="254" length="0.372" lyric="day"/>
  <vocal time="116.184" note="254" length="0.373" lyric="the"/>
  <vocal time="116.560" note="254" length="1.123" lyric="sun"/>
  <vocal time="117.686" note="254" length="0.372" lyric="will"/>
  <vocal time="118.061" note="254" length="1.123" lyric="shine"/>
  <vocal time="119.187" note="254" length="0.367" lyric="on"/>
  <vocal time="119.557" note="254" length="0.937" lyric="you+"/>

You can get them to display on the same line by doing something like this:

 

http://i.imgur.com/3iI6KEJ.png

  <vocal time="54.735" note="254" length="0.374" lyric="But"/>
  <vocal time="55.112" note="254" length="0.375" lyric="one"/>
  <vocal time="55.490" note="254" length="0.374" lyric="day"/>
  <vocal time="55.867" note="254" length="0.374" lyric="the"/>
  <vocal time="56.244" note="254" length="1.129" lyric="sun"/>
  <vocal time="57.376" note="254" length="0.375" lyric="will"/>
  <vocal time="57.754" note="254" length="0.563" lyric="shine"/>
  <vocal time="58.320" note="254" length="0.563" lyric="-"/>
  <vocal time="58.886" note="254" length="0.372" lyric="on"/>
  <vocal time="59.261" note="254" length="0.935" lyric="you+"/>

What gives?

I can't remember what caused this, but I'm assuming it's just general pickiness from the game.