If I understand the logic behind your question, you are asking:
Since movies is plural, why is the singular movie and not movy?
In general:
Well, just because there is a common and helpful rule that states
A noun ending in a consonant and then y makes the plural by dropping the y and adding -ies
this does not mean that you can always apply this rule backwards to any plural word ending in -ies to get the singular of that word.
That is, there is no rule that says a word whose plural form ends in -ies comes from a singular form that ends in consonant plus -y.
You can apply the rule backwards, when it was originally to a word, as in
daisies : daisy
ponies : pony
But you cannot apply the rule backwards when it was not originally applied. Thus the following does not work
monies : mony
(Note that money has two plural forms, moneys and monies.)
In Particular
And the following does not work:
movies : movy
Because the singular of movies is not movy but movie. The why of that has to do with movie coming from moving picture. Mov(ing picture).
The -ing picture was replaced by the ending -ie. I suppose it could have been replaced by y (after all, we have such nouns as gravy.
I suspect that movie(s) originally had a diminutive meaning, in which case the ending -y seems to be fine only in words whose last consonant is doubled (doggy, granny) while -ie goes with those kind of words (doggie, grannie) or...
with words whose consonants are not doubled (sweetie, birdie). I guess movvy didn't quite work, any more than movy.
A similar word to movie, now outdated, is
talkie
It has the plural talkies. The word talkie apparently does not come directly from talking pictures, but from movies. The mov- was replaced by talk-.
Note that we have 'walkie-talkie'. This conforms with -ie usage in words whose ending consonant does not double. But later on came the form 'walky-talky'. One can only guess why this variant spelling came about.
Well, in the end, it's YOUR name. It's completely up to you how you want to spell it. In fact, if you want to have a different name entirely, you can introduce yourself as a different name and people will call you that.
There are often different spellings of names. My name is Alex, but I've met an Alyx and an Alix.
Just spell it the way you want to. Completely up to you. I don't think anybody would go out of their way to spell your name in a different way to disagree with your spelling. Names are names.
Best Answer
Not all dictionaries make it clear, but as others have said, the usual AmE form is leveled.
One dictionary that does express this clearly is Longman (if you scroll down the page until near the bottom, where it deals with level as a verb):
There are many other verbs in -l that follow the same pattern: travel, cancel, counsel, dial, model, signal, etc. In most (possibly all) cases the double-l forms are considered acceptable (if less common) alternatives in AmE. On the other hand, the double-l forms are generally considered mandatory in BrE.