VIP level is incorrect

You'll need to post in the Xbox Rewards Questions forum in order for support to check your account. Keep in mind that subscriptions, in-game consumables, and preorders do not count towards VIP.

As of September 2014, VIP status is no longer based on gamerscore (btw, legend status only have 3% back). VIP status is now based on star levels. You need at least 1 star level in order to receive a VIP rebate.

Hello BejitoX,

Your $6 purchase in June went towards the Rewards Hunters offer. Purchases that go towards offers do not also go towards MyVIP. From our FAQ:

What type of Rewards can I earn?

In addition to our special events and offers, there are two easy ways to earn Rewards Credits each month; by completing missions or special offers, or with a MyVIP Star Rank. To see current
missions, visit the MyMissions page. For more details, please see the Terms and Conditions. Don't forget to check back often to see what's new, as missions are updated frequently!

To learn more about your MyVIP Star Rank, which gives you a percentage back on what you buy in the Xbox Store, visit the MyRewards page. Once you have earned at least 1 Star, you'll start earning each month
based on your qualifying purchases from the previous month.

Please note: Xbox Live Rewards members may not earn Rewards Credits for multiple offers based on performing the same action. For example, your purchases made to complete a monthly mission won't also be eligible for MyVIP.

This is why only your $30 purchase in June had MyVIP payback. Your purchases in May continued to be reserved to complete a $10 amount in a following month.

A staff member will have to review your account and they will reply to you here. Keep in mind they work Monday - Friday from 9am to 5pm PST and do not work on weekends.

Also, keep in mind that they do pay in increments of $10. So while it sounds like your amount is off, your June payment would be based on $40, not $42.23. So $2.23 would carry over to July. No matter, just a small note. The staff will still reply to you
on Monday or Tuesday.

There's nothing to opt in to for VIP. Anyonr who signs up for the rewards program is automatically enrolled. VIP status is based on your star levels (how much you spend in the marketplace). You can check your VIP status on the MyRewards section of the site.
You can see how much you need to spend for each level at http://rewards.xbox.com/terms-and-conditions