Mine is simply orthographical. Some are informally transcribing it to the nearest English equivalent, but pronunciations are different, there are different ways to transcribe it, and even the original spelling is influencing it a bit:

• "Uh-Gah Teh Emm-y-El" implies the first /a/ from "agá" (H) got reduced to [ɐ], the last vowel in "ele" is being elided, and the /e/ in "eme" (M) is being lowered to [ɛ]. I bet the -y- is to represent [ɨ], English lacks the sound so it gets tricky to represent it.
• "Agga Teh Emi Eli" implies the ending /e/'s are actually /i/'s. There's some orthographic interference though - the "e" in "eme" (M) is typically [e] for those folks, but the one in "ele" (L) is [ɛ] instead.