'.. about when we will meet.' is grammatically correct but the sentence isn't natural because 'will' is not used for plans/arrangements, so '.. when we're meeting' is better. :)

The correct answer is the first one. Will and well are not synonyms. "I am confused about when we will meet, tomorrow or next week?" is correct.

they are both the same, it is common in English to find word reversal between different speakers and regions. They could mean slightly different things if you changed the stress and on which word you stressed. "when WILL we meet Tomorrow or next week?" "when will we MEET? Tomorrow or next week?" "when WILL we meet Tomorrow or NEXT WEEK?" "when will we meet TOMORROW or NEXT week?" and the same for the other word order. "I'm confused about when we WILL meet, Tomorrow or next week?" I'm confused about WHEN we will meet, Tomorrow or next week? and so on there are many little stress differences you could put on the words. first one is possibly indicating when/if a pre arranged meeting is happening. you have forgotten the dates tomorrow or next week. second one is possibly enquiring about if you are going to meet. "are we meeting tomorrow or next week?" a more direct way of saying it.

It would be better to say - I'm confused. When are we meeting? I'm confused. When are we going to meet? I'm confused about when we are to meet?

We haven't meeting today, there will be next week.