Mine is pretty well the same as Sleepy's, the only difference is my background pic covers all 3 monitors.
I believe eyefinity engages when the control center loads.
So you're saying the control center isn't automatically detecting monitors. Obviously your vidcard is somewhat different with it's mutliple display ports, so for reference, in the control centre under Desktop Management/Advanced Display Settings/ USE Manual detection only is enabled.
I would guess the other setting.. detect whenever the control center is opened would function like what you're seeing.
#1: Phenom II C2 955BE @ 3.6, Antec Kuhler 920, Gigabyte GA-MA790FX-DS5, Asus 5870/V2, ASUS Xonar D2X, 4 x 1gig OCZ2N1066SR2GK @800, Antec Truepower New 750, Arc Midi, Vistax64
#2: Athlon 64 X2 4200+, AGP 1950pro, Audigy 2, Asus A8V-D, 2gig ram, Enermax 465P, Antec900case. Now on Win8.1pro cat 10.2