Chomsky or Greibach Normal Form?
A context-free grammar is in Chomsky normal form if all productions are of the form $A \to BC$ (where $B,C$ are not the starting symbol), $A \to a$, or $S \to \epsilon$, where $S$ is the starting symbol. A context-free grammar is in Greibach normal form if all productions are of the form $A \to a\alpha$, where $\alpha$ consists only of non-terminals (but not the starting symbol), or $S \to \epsilon$, where $S$ is the starting symbol.

Every context-free grammar has an equivalent context-free grammar in Chomsky normal form, and another one in Greibach normal form; there could be several equivalent context-free grammars in either normal form.

When you applied the rules to convert your grammars into normal form, you got Chomsky normal form because the rules were designed for converting a given context-free grammar to Chomsky normal form. You could follow other rules and get Greibach normal form.