The little glitches in the IAP have been fixed and there is an update available if you have already downloaded Tangle Library and the first in-app-purchase tangle pack - Totally Tangled.
And even better news! The second in-app-purchase tangle pack - Kidz edition - is available now as well. Don't be fooled by the name, this pack is not just for kids!
You need to purchase Tangle Library if you don't already own it. You can get it in the Apple App Store - just do a search for "Tangle Library".
Once it is installed on your device, you can purchase the second and third packs from within the App.
Ian made this very useful little video to walk you through the process. It is also posted on the Tangle Library Facebook Page, in case you can't see it here.
Once you have purchased the additional packs of tangles, you don't have to buy them again on each of your devices. You do need to be sure that each device has been Updated, then, on the page where you would make the purchase in the app, click on the "Restore Previous Purchases" and the tangles should be added to your App.
Added Note: I didn't realize that each time a new major upgrade is posted, the previous reviews disappear from the iTunes App Store page! If you are enjoying Tangle Library or have an usual use for it, could you please post a review? It really does help! Thanks in advance. :-)