Restore deleted expenses in the workspace

I entered about 20 expenses, then I ran a report to see how it worked. Going back to expenses I find out that those expenses have been taken away from my expenses list. I deleted them from the report expecting themto go back to the expenses list. Instead they just disappeared and all the work that I put into putting those expenses in, was wasted. When I remove an expense it should go back into expenses to be used at a later time. Not deleted.! I'm glad I found this out before I had entered a thousand expenses! This could be a showstopper. I'm very reluctant to use this program now. I can't afford for a mistake to wipe out hours of work.