Two admins working at once

If we have 2 admins updating zen at once (for instance, one person is updating inventory counts in one category, and the other person is updating counts in another category), could this effect accuracy. I am fully aware that this might be a dumb question, but we have noticed some numbers not updating and I have 5 or 6 people that do various things to zen and possibly sometimes they edit things at the exact same time. I realize that this could be a problem if they were working on the same product, but if they are working on different products and hit "update" at the exact same time, will we have a problem.

thanks!!!
Lisa

Although a conflict is theoretically possible, MySQL is very good at handling large numbers of "simultaneous" transactions from huge numbers of users. So the odds of causing a problem by having two people working in different areas hitting update at the same time are very, very small.