Each day a new view (in today's screen)

Hello,

i note a strange behaviour on today's screen.
Yesterday i find all my project son of another (ie project 1 has project 2 as subproject and 2 has 3 and so on...).

I use admin screen to correct errors, i get a message of correction for WBS and everythng goes right.
Today, there is my today's screen :
 

Guess what ? MAPENVIR is not subproject of CAE_SID and MAPINFO is not subproject of CYBORG.

I go to CAE_SID project's screen to check and see that there is no subroject for CAE_SID (as expected) :
 
For MAPENVIR, not a subproject :
 

In Consistency Check :
 

Any idea, 2 time a similar error on 2 days...

I have not corrected the error yet to keep track on this issue.

Regards,