It should go without saying, but please make sure you only use that seed for practicing, and never send any coins to any of the address, since it is now publicly viewable to anyone and everyone.

So, if you use the derivation path m/44'/0'/1'/1/0 with that seed, you get the address 1Z1EMQjFuyRvG3vZhrQpQKPjbu4zwYXsh as you say.

The address 1NAxsdvXQeuEozUVvyVgge5B3vv1SutCB1 is found at the derivation path m/44'/0'/1'/1'/0/0. This means that in the derivation path box in Electrum, you must have entered m/44'/0'/1'/1'.

As I said above, you've added an entire extra level by adding in an extra /1', which results in a completely non-standard key. It is possible (but not recommended) to add as many extra levels as you like, as all that happens is more child keys are derived from the parent keys, but as you have discovered you will end up with a completely different set of addresses and the potential to lose your coins.