In some situations after a different designs have been worked on (in particular designs converted from DIY v1) , TyTags DIY v2 will revert to a previously edited design during the printing process.
This is a high-priority bug in version 2.0. It has been solved in version 2.1 and above.
If you encounter this problem, simply save your design, then close TyTags DIY v2 and restart it. Reopen the saved design and everything should work fine from that point on.
Update your software immediately. You may do this via the File Menu - Update - Update via the Internet.
Done