Can You "Turn Off" Order of Preference For Wi-Fi Networks
No, not without special functionality on the accesspoints themselves.

The thing you are referring to is called wireless roaming, something that usually can't be done with simple consumer hardware.

As for OS X, it only reconnects when the current connection is lost. If you can make sure there is no overlap between the accesspoints or repeatets, the connection will always be lost and then you will switch to the next network. This might be possible in your situation if your repeaters or accesspoints allow you to reduce it's radio power in it's settings.