Frozen Cards+issues

Please have a look at and let me know if you can edit it. Over the last few months it has happened that I will create a card, often Type:Source, but almost always one with other cards embedded and, upon saving, it becomes uneditable. The embedded cards may be modified, but the new outer/uppermost card can not be put into edit mode. Sometimes this is preceded by the process of creating a pre-formatted/pre-structured card. Included sub cards appear but will not retain content during the framing card's creation.Then I submit, to see if I may add data to subcards later. I can but the parent card is frozen. I have cleared the caches, restarted and tried different browsers, and tried to use /card/edit/ all to no avail.

Any suggestions would be appreciated.