Problem/Stability?/Suggestion

Ok this product seem really not stable ! 

This morning if look if I have some activities in (activity detail) I see in summary some time has been logged (this is good) now I loog for activities (no details!). I wait ... and after my luch I look back not in summary I didn't have any time for last 7 days ?!?! what ? an hour ago all is ok in Summary now I did'nt have any information in summary and in details !

:(

Suggestion .: PLEASE

1- fix all this mess 
2- Add half hour for time limit by day ! (I didn't ask for range hour blocked) I would specify 1:30 hours allowed by day.