The fix for the LTR problem in the interlinear is fixed in 8.0.100.33 -
this was just released to all users earlier this week. If you have turned
off automatic updates, use Help > Check for Updates to get the latest
version.
The problem with interlinear data disappearing on migration is most likely
a mismatch between the language code used when migrating the interlinear
data and the language code on the model project.
If you look in your project folder (C:\My Paratext 8
Projects{project_name}), you will see a folder with the name
Interlinear_{code} this may have to be adjusted to match you model project.
If you give me the name of your project - you can send this to me directly
at [Email Removed] - I’ll see what needs to be done.
John+Wickberg
Paratext Support