Equation automatically rounding... it shouldn't be (I think)

Okay,

  I've done some searching and have not been able to locate anyone else who has had this problem, so I'm worried that I'm missing something...  let me explain:

The equation is driving spacing for a linear pattern and works out as such:

"D3@TiePattern" = ("RD4@Annotations"-5.50)\(iif("RD2@Annotations"<72.00, 3, 4))

...or

spacing = 75.92 / 4

problem is that solidworks is solving it at 19", not the 18.98 that it should be... and that's causing an issue for what I'm doing over here.

So I guess, I'm left wondering what the heck I could be doing wrong or missing over here...  I've checked my unit settings, they're good, and if I set the value manually at 18.98 - SolidWorks will space them at exactly 18.92, not 19".

Any ideas?

-Steve

(SW 2011, SP5.0)

SolidworksAssemblies