What the..

Okay, I'm learning the last 10 or 12 characters of Hiragana, and I went to a website on Japanese grammar: something's got me stumped:

(わたしは watashi wa ) means 'I' (は wa) means 'topic)'

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Now, I thought わ meant "wa" and は mean "ha." Am I wrong?! Here's another one.

(みせ へ mise e ) means 'store' with the directional particle (へ e )

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Doesn't え mean "e?!" Isn't へ "he?!" Am I missing something?

Well, it's pretty simple actually. As particles, は (ha) is pronounced "wa" and "へ" becomes "e." I believe Ha and He are probably based on archaic readings, although you still find them a lot in some styles of romaji today.