I'm posting this in hopes that SOMEONE has figured out how to fix it, although I doubt it.
It seems like everyone's 'center' tags on pet lookups are broken. This is driving me BONKERS. Not having my pets' info centered is making my symmetrical-ness want to cry ;-; has anyone figured out how to make this work yet??
You could try using .contentModuleContent {text-align: center !important;} in your CSS- I haven't tested it 'cause I'm sort of busy right now, but it should work.