Disappearing Next Actions :-(

I really love Nozbe, but the bugs in the iphone app are killing me. I use the app when away from my office during/after meeting with a client. I had several meetings yesterday and added/modified next actions. I synced the phone to nozbe this morning and some of the next actions/modifications have vanished. This has happened to me before and now I am getting worried. If I hadn’t noticed that one of these was missing, it could have cost me several thousand dollars in a ruined business deal. I really hope that there is a solution to this problem because losing important action items is the opposite of GTD. I have recommended Nozbe to many business associates…I hope that doesn’t come back to bite me. Any advice?