I don't remember the exact wording but I think Apple said the BIAB for iPad app wouldn't be compatible with future upgrades. I've switched to using the BIAB app without the "iPad" in the logo and I'm not getting any warnings from Apple on that.
This is still not satisfactory. I have posting requests for fixes and necessary improvements to this app in the wishlist section for THREE YEARS and only one fix has been made. I still use it, but working around its faults and quirks continues to be very annoying. I pray that some day PG Music will finally upgrade this good app to make it truely great.