Congrats! Glad to be of assistance. Trust you'll be running only one instance of Moodle - APC doesn't fair so well when running multiiple instances of Moodle ... even if same version/build date.
Wow! So the college of life sciences runs their own local repo system, huh? That's quite a chore. Guess they are doing so for the 'safety' of the college network and 'protecting' server admins from themselves. Well, that keeps at least one more person on the payroll, I guess. :|
For future reference:
One of the characteristics of CentOS ... they are always a little behind ... not unusual to use 3rd party repo's - such as the one above - to get versions of PHP or MySQL not in Cent repos.
'spirit of sharing', Ken