Prohaps it was an easter egg Ken. After all RE5 was in production during this game's release wasn't it? BTW, I had a few paraniod discoveries about Wesker's birth number.
Resident Evil 5 came out in 2009 013 years after the first RE came out. RE5 was canon game number 013
RE1
RE2
RE3
RE Survivor
RE Code Veronica
REmake
RE0
Dead Aim
Out Break
File 2
RE4
Deadly Silence
Umbrella Chronicles
Yes, that's actually 14 but combine Remake and the original RE1 since it's basically the same game with additions and retcons.
Wesker/013 also died in canon game 013. There were a few more, but I honestly and unfortunately can't remember them. I feel like one of those people that obsess over the "illuminati" and find things that probably arn't even really there or were not done on purpose. XD *Sniffle* I have no life! Lol, nah, it's probably just coincidence because I personally think the whole Wesker children thing is new.