Cam phase suggestion advice

How do you figure 108 centers the overlap??? The program I use show 111 centers it.

From the website I got this; so in post #7, I asked
Is this the cam?
10200702
Hydraulic Flat Tappet. Mid level performance street cam with excellent drivability. Works well with stock type exhaust manifolds and dual plane intake with mild 4 bbl carb. Great 4X4 and performance marine cam where dry exhaust is used. Improved valve springs and roller rockers recommended.; Advertised Duration (Int/Exh): 262/268; Duration @ .050 (Int/Exh): 220/226; Gross Valve Lift (Int/Exh): .475/.494; LSA/ICL: 112/108; Valve Lash (Int/Exh): Hyd/Hyd; RPM Range: 1400-5800; Includes: Cam Only
112+108/2=110LSA

From that I determined that overlap is ;
(262+268)/2, less 2x110= 45*. I split that and gave 23* to the intake and 22* to the exhaust .
262 is the intake duration; taking one half of that, and subtracting the 23*, I get an ICL of 108*
Did I do it wrong?

Yeah I guess I did,dammit. I didn't read the fine print, namely LSA/ICL

That makes all my pressure numbers about 3 or so psi less..... which is a bad thing because it paints a rosier picture than it really is. However this combo is so close to the line that 3 psi is not really meaningful to the discussion,IMO.
Nevertheless I'm wrong and
Special thanks to @yellow rose for the clarification. Good catch.