What the..

[Matsuyuu]

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

[Elizabeth]

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.