No, in English Mandoble IS pronounced Man-Doh-Bull. As far as the different ways to explain how to pronounce stuff, there is a 'standardized' way that goes in dictionaries and stuff, but most people just try to type out the right sounds.
Also, the emphasis in English for Mandoble is on the second syllable. Man-DOH-Bull.
In Spanish, it looks like the emphasis is on the third syllable- I.E. Man-doh-BLE.
I include an H on the end of stuff to 'soften' it, if that makes any sense. For me, Doh and Do are pronounced differently. Doh is, well... Doh. Lol. If you have ever watched the Simpsons you know what I mean. Do is DO. Like go DO this. Or even, Mountain Dew (the Dew is pronounced the same as DO).
I'm still kinda confused on how you actually say your name in Spanish. I'll have to get on AHV with you and have you say it

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