A tool for checking your electrum wallet is generating correct seeds, and the correct addresses for those seeds.
Download ElectrumSeedTester-standalone.html
Enter your Electrum seed phrase into the 'BIP39 Phrase' field. The correct tab should automatically be selected, and the correct addresses should be shown.
This project is a branch of Ian Colemans BIP39 tool: https://github.com/iancoleman/bip39