Position field missing "New Line" option in drop down during screen customization

I am customizing the Company screen. When I try to move fields to a new row, "New Line" is not available. I see "Same Line" & a blank.  I try to use the blank, update it, save it, but it always reverts back to Same Line. 

Looking at other screens in Lead, Oppo, etc. they are set to Same Line or they show up as blank, which equals a "new line" setting.  But, if I try to select that blank, it doesn't stay for me.

How do I get New Line available again?

I did an IIS Reset & it didn't help.

v. 7.3 SP3