Skipping 0s?

Anyone ever notice how when you type like 0's, it skips without even spacing it?

Code:

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100000

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Why's it do that? Does it expect the number to be one hundred thousand and skips where a comma should be or something?

Code:

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100,000

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Update: Notice the [code ] thing too?

Code:

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100000

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Code:

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100,000

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Code above looks like:
([ c o d e ] changed to <code>)

Code:

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<code><space>100000</code>

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Code:

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<code><space>100,000</code>

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Now look at it, it works! The mysterious VB-World :).