I thought it was only Tides that counted along with BT-IV. I don't see anything about my Wasteland 2 pledges and I definitely used the same address.
I could be wrong. It's how you interpret this:
Can I use my previous inXile accounts (Torment or Wasteland 2)?
If you previously pledged to Torment: Tides of Numenera, then you can use that account on The Bard's Tale IV's web site.
If you previously pledged to Wasteland 2, unfortunately, that information is not available to the Torment web site and we cannot reuse your account. You will need to register a new account. However, if you use the same email address as you used on the Ranger Center, we will attempt to link up any previous Wasteland 2 rewards. This way, if you qualify for any bonus rewards which rely on you having backed Wasteland 2, you should be able to do so.
If there is any concern, I would contact InXile. I had a great experience with them yesterday. I did NOT qualify for the first 48 hours bonus (free copy of Witcher 1 or 2 or WL2). I missed it by a few hours. But the time stamp on my reward made it appear that I did.
I sent them a note for clarification and they fixed the issue.....and gave me a copy of WL2 anyway. All within a few hours of contacting them.