Hey my friend. Uploading Your Work-In-Progress has nothing to do with Uploading and SUBMITTING your FINAL Hi Res .TIFF file.
To submit your Concept Sketch or 3D pre-visualization, Line Art or Model, Final Image Milestones, you must go to SUBMIT ENTRY. When you upload each piece, you choose the specific related Milestone title. Once you have submitted all 3 milestones then you can upload the FINAL IMAGE (FULL RESOLUTION TIFF file which you will place in a zip file and assign it the name given when you log in to upload the Final Image). - All needed info stated.
DO NOT mistake UPLOAD FINAL IMAGE for the Submit Entry Milestone ‘Final Image’.
Submit your milestones where it says Submit Entry which is Above Upload Final Image and below Team Management.
Hope this is clear. Good luck!