I created a Tier...and now it's gone! And, I can do it again & again!
OK, all worked well UNTIL: I added another checkboxed source, besides the Tier SER auto-made it from. Once I did, the Tier vanished!!!!!!! 
A real mystery, no!?
I can do it again and again. BUT--U cannot use the names of the missing projects. So, where are they?!
Any ideas???!?!??!??!?!? THANKS!!
PS-I've done this oodles of times in the past. What's up NOW that makes this happen?!

A real mystery, no!?
I can do it again and again. BUT--U cannot use the names of the missing projects. So, where are they?!

Any ideas???!?!??!??!?!? THANKS!!
PS-I've done this oodles of times in the past. What's up NOW that makes this happen?!
Comments
Hmm...Why??
What I did: I created a Tier from an exist Tier.
Modified: Changed name of Tier.
Then, added the second set of URLs to link to.
When I clicked OK, that's when the new tier was lost. (moved to root)