If I were you i'd carefully consider the advice being offered here. It comes from people who have already "made all the mistakes" and are happy to try to stop others falling in to the same traps.
We are certainly not wasting your time - we're actually trying to help you not waste your time.
Having looked at your sheet, I'd say that you are asking for big trouble even attempting to do what Excel is not good at. Trying to "link" the data given your current set up will be impossible to lock down to ensure the integrity of your data. I will bet Dave's next adsense cheque that if you manage to build something like this, it will take at most two weeks before a user screws it up for you.
If you want easy data entry for your users, use a userform to capture the data - better yet, use a proper database app to store the data (such as Access) - you can always use XL for front-end data entry & reporting if your users don't have Access.
The whole idea of trying to maintain links between two sheets where the data is held in a completely different format is fundamentally wrong.