Let me start by saying your code is a bloody mess. You'll have less trouble troubleshooting if you have clean code. Your head element is nested within your body element. You're using a tag that doesn't even exist (<left> ). You're not closing your tags...a mess.
Now, on to your problem.
I cut and pasted the part of your code that is the issue, and then took all the superflous stuff out of it:
code:
<html>
<head>
</head>
<body>
<form action="mailto:mobrul@hotmail.com?subject=Online Book Order" method="post" enctype="text/plain">
Name: <input name="name" type="text" id="name" value="" size="30"><br>
Surname: <input name="surname" type="text" id="surname" size="40"><br>
Address: <input name="address" type="text" id="address" size="40"><br>
Zip Code: <input name="zipcode" type="text" id="zip code" size="15"><br>
City: <input name="city" type="text" id="city"><br>
State: <input name="region" type="text" id="region"><br>
Country: <input name="country" type="text" id="country"><br>
E-Mail: <input name="Email" type="text" id="Email"><br>
Telephone: <input name="telephone" type="text" id="telephone"><br>
English Edition: <input name="engEdition" type="text" id="engEdition" size="4"><br>
Spanish Edition: <input name="spaEdition" type="text" id="spaEdition" size="4"><br>
French Edition: <input name="freEdition" type="text" id="freEdition" size="4"><br>
Italian Edition: <input name="itaEdition" type="text" id="itaEdition" size="4"><br>
German Edition: <input name="gerEdition" type="text" id="gerEdition" size="4"><br>
I authorize...: <input name="autorizo" type="checkbox" id="autorizo" value="Autorizado"><br>
Credit Card #: <input name="creditcardnumber" type="text" id="creditcardnumber"><br>
Expiration Date: <input name="expirationdate" type="text" id="expirationdate" size="5"><br>
<input name="submit" type="submit" id="submit" value="Submit Order"><br>
<input name="reset" type="reset" id="reset" value="Clear Form"><br>
</form>
</body>
</html>
...and it works like a charm.
I also noticed that the name and id of your 'how many of each edition' input fields were all the same thing -- namely 'ejemplares'. In my version, I gave them unique names and ids.
To be perfectly honest with you, I have no idea what caused/solved the problem. It could be the duplication of input names. It could be the messy code. Some browsers are pretty forgiving, but they'd have to be REALLY forgiving to work as expected under those conditions.
My advice to you would be to take what I have, then start adding your pieces on until one of two things happens:
1) something breaks
- - note what you added, and if you can't figure it out yourself come back here and ask away.
2) you finish the project successfuly
- - send me a cookie.
Hope that helps.
PS
Sending unencrypted credit card numbers via unencrypted e-mail isn't a good way to keep your customers. You may want to rethink that business plan.