Asking for help - My fonts are "bleeding".

What do I do so this "bleeding" on this image goes away?

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I would also like to know if there is a way to make it so that brushes can become a bit sharper than on these examples:

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I have tried sharpen on these two, but it just looks... weird. I am using PS8. Help is very much appreciated. I have looked at the archive, but I get the feeling I don't really know what to search for here; layers, filters?