Your pronunciation is fine. 1 and 3 are the same.

Steel and steal should be pronounced with a long vowel (I:), still has a short vowel, in English the length of vowels is very important cause it changes the meaning of a word: for example: ship and sheep

Yes, 1 and 3 should be the same. But, your 1 is a bit shorter than 3 right? I guess you pronounced each one differently.

Yes perfect 1 and 3 have the same pronunciation