No, that isn’t spelled wrongly, it is the way ‘welcome’ is spelled in Dutch. As you will find out in this site, many Dutch words are very similar to English ones; in fact, of all languages, Dutch is probably closest to English and hence, easiest to learn!
Why don’t you try and match the following Dutch words with their English counterparts. You can listen to the words too! You will notice, when you listen to the way these words sound in Dutch, even though they look very similar, the pronunciation can be quite unlike English. Try this little test.