I had four wallets and did the standard Electron procedure after moving my BTC to fresh electrum wallets.

Two wallets came up with accurate BCC balance. The other two - which were both over 1 year old, with longer transaction histories, came up with way less BCC than should be there. Many tx's missing - both red and black.

I have switched between ABC servers manually, but nothing helps.

Anyone had this happen?

The two "new" BTC versions of these wallets do  not have the tx history. Can I just create "version 3" of these wallets, and then import seeds from current version into Electron? Or should I move the BTC back into the original wallet and try again?