I doubt theres a problem, just figured when changing those hoses you had to lose some.
When I changed the hose from the overflow to radiator I lost a bit.
Only because I removed the old hose, went back into shop to measure origional against the replacement I got sidetracked, came out to car and had a big puddle under the car, ooops! No biggie, we stock every antifreeze thats out there, topped er off with valvoline/zerex GO5.
Edit, I see you didnt change any hoses. Not sure. most cars just dont lose antifreeze for no reason. Maybe yours wasnt as full from factory as Ive seen others
'06 Tungsten GT 18" CT-R Gunmetals
Xcal2, JLTII, UDP, ProKit, Dspecs, Bump Steer kit, SS brake hoses, Strut Tower Brace, UCA, Adj.LCA's, AntiSquats, Panhard bar, MGW shifter, Steeda cowl hood, Hood pins, MRT hood struts*, 14" Antenna, Sequencial TL's, 07 Plenum cover, PJ Saleen heritage fascia, CDC ductail, SSE 1/4 window louvers, MAG mirror inserts, Rear trunk painted, MGW window switch plates, Billet door lock pins, Interior trunk release, Tint.