Some Forms Not Displaying

Some forms are not displaying in a db I set up, but haven't seen for a while.
It is used by the office I built it for. When I last saw them, the db was
duplicating itself, but they were unable to pay me to look into it. Also, at
that time, they found that their hadware/network guy was sabotoging their
system, causing sharing problems for Access (I think). Sob story, I know,
but it is relavent. Today when I looked at it, not only was it duplicated
eight times (ten by the time I left), but the two most important forms would
not display. All of the subforms seemed to be okay, and the clerk can enter
data into the tables.

When I checked the database's properties, the Statistics tab showed that the
db was created March 12th, 2002, which seems reasonable. The General tab
shows that it was created July 19th, 2005. I was about 900 miles away at
that time on a family vacation.

Could I have some suggestions on what went wrong and how to fix it? Thanks
in advance.
.

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