Hello!
Regarding the contract, you do not have to upload any pages of it, as you said RIRI only tick that box. They will hand you over a hard copy on your first day of your induction
About the picture smyle/ no smyle...if you read the important notes document on the right hand side of your portal, you noticed that you will need to bring with you 10 passport photo with smile and 2 5x5cm size without smile, clear face and no earings. The first 10, as well as the photo you need to upload are for UAE and company use...so they can be with smyle. And preferably send a photo with smyle as it will be on your residence visa
Regarding the other photos, they are for usa visa purposes, and they need to be without a smyle, no hair on your forehead(at least both your eyebrows to be visible) and no earings!!
About the medicals. The ophtalmologic report you do not need to upload it, if you don't have any eye problems. In fact to speed up the process you can send them a query regarding this and they will remove the link for that document (if you don't send them this query/email...they will send you an email asking if you have eye problems and you will have to reply)
the rest of the checks can be done at any doctor as long as they are accurate, in english(or translated into english bu an authorised translator - no need for notarial legalisation) and have the appopiate doctor's stamp and signature.
it is important to upload the documents within the time frame of 2 weeks. if you cannot do that, advise them of how more time you will need! After you have completed uploading everything you can check if they have visualised the documents by seeing that out of the 2 links each uploaded document has (remove and view) it will remain only 1 - view link. after they have seen the documents it can take between 2 days and 3 weeks (from what i've heard) until you get your Final Approval (via an sms and email).
Good luck to everyone!