Is your phone an android? You could use this app https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en to check what's going on with the SSIDs and also (if your phone supports it) flip between 2.4/5GHz to check the SSIDs are being broadast on the right channels/frequencies.
Failing that you can stick inSSIDer on your Windows Laptop http://files.metageek.net/downloads/inSSIDer-installer.msi
To check the network connectivity you could try pinging using your from phone using this https://play.google.com/store/apps/details?id=com.overlook.android.fing&hl=en (again android only). Also check the network strength using either of the above.
You did lose me at current, but as far as i know, a repeater wouldn't have a cabled connection to the network. That's more of an access point. It might be you've created a switching loop of power and might by plugging your repeater into the the same LAN (assuming all your access points just bridge between your WifI/LAN, which is what most access points do).