I followed the steps up to 31. "30. Click on the Meeting ID for the 9/17/19 meeting with Maria Valducci to see its details
31. Now you can see how that Pitch field you added to the Meeting object “connects” this meeting to its
corresponding Pitch record—but is that really the right one for this Meeting record?
32. Turns out you can “follow” that connection to see the data at the other end—just hover over the Pitch
ID value (P-007) to “peek” its key Pitch data & there it is...Valducci Amalgam—bingo!" The pitch was blank so I could not hover over "P-007", so I decided to start over again. I ended up going back to Setup > Platform Tools > User Interface > Tabs and then deleted meetings and tried it all again but it seems like it duplicated. Please see attached picture to see duplicated meetings

After I managed to delete all the meetings to start over and reimport but now it's missing the Julia Chavez meetings and the numbering of the meetings are off.

Is there a fix for this or would I need to create a new salesforce account and catch up? If things are too messed up I understand if I need a fresh salesforce account. Is there a way to bypass the payment since I already paid? I understand that the labs and steps provided stated the importance of not redoing the whole lab as it can make things worse. I've only tried to undo some steps but I understand that has made it worse.
Ok, yeah, I get it. It may be easier to start over in a brand new account at this point because the Meeting records you have now will have the wrong IDs and you can't really change those without redoing a bunch of stuff anyway. But you don't have to redo everything from before. Just some steps from 1b and 2a. And you don't need to pay again - you can email me and I'll send you a promo code. But you'll need to install the grader again in the new account. Still not about - maybe 30-40 min. Then you'll have a fresh, clean start for 2b.
Here's the instructions on how to do it:
https://www.maxzplace.com/instructions/how-to-catch-up-to-start-lab-2b-with-a-brand-new-salesforce-account