I found one similar forum but there was no answer. We have successfully shared several packages (.tpk's) for our AGOLO site, those have been under 10MB. The latest one we have tried several times to share is 12MB. We are using the Share Package took in ArcMap. We do not get an error and it seems to have completed. However the package is not visible anywhere online. What else could be going on that it runs completely but is not visible?