you are doing what i did a while ago, mining a fork most likely. if you are not fully synched up then this is the issue. backup your wallet.dat file and delete the blockchain info from appdata dir. restart the wallet app and wait for it to fully synch blocks. then shut it down and replace the saved wallet.dat file. now you see if any of those phantom blocks were real..
if you are synched already then maybe youre lucky! and just in for a long wait.
would there have been this issue had the nodes worked? disconnect / desynch = mining your own fork = wake up to lots of blocks! but... oh well. the nodes seemed to work for some but whatever i put in did not last long enough to get a proper synch.