It keeps around 270 keys from 60000. The only thing that doesn't work is 'broadcasting transaction' - the very final step right? I have gui and console backups, the ones I filtered manually also didn't broadcast the transaction. I rescanned the blockchain and have 2 new export files. These I did not filter manually, I guess there is no need since the filter is built in already.
I don't know how many days I am trying this already but I get weak.