CCS!Syaoran is not R!Syaoran
Timelines: IMHO
R!Syaoran caught by FWR, approx 7 years old. R!Syaoran improsioned for approx 7 years. Clonie created.
CCS!Syaoran 10-11 years old, events of CCS and the master of the clow arc
CCS!Syaoran goes home
CCS!Syaoran middle school ~13-16 returns from Hong Kong
Approx 7 years pass for clonie/real syaoran. The gang set out to collect the feathers. TRC!Syao/Sakura approx 14 years old
The ages dont match people!
Also Yuuko mentions Sakura and Syaoran back in volume 1.
We have 3 syaorans
CCS!Syaoran - in the same world as Watanuki, "this" world
Real!Syaoran - Imprisioned by FWR for most of his childhood. We dont know what world he came from, but he is a decendent of Clow and was likely raised as such. He knows the same magic as CCS!Syaoran who was also decended from clow and raised to use his magic. Likely from a world similar to that of CCS
Clone!Syaoran - Made from Real!Syaoran
Sorry if that was confusing
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Also i find it interetsing that time passes differently in Fai/Yuui's tower. Who know how long the kids were trapped there. Yuuko also mentioned that Fai's [yuui] life is longer than normal due to his magic.