I was making my shop in the mall and wanted to add a second floor with an elevator sign, but only the bottom sign worked and when i go to make the top one it says the sign is not locked by me and wont let me destroy it, the first two times i figured out how to destroy it like breaking blocks around the one the sign was on and it came off but this time it wont work when I try that.

When I'm farming sugar cane or wheat, i cut it all down but some of them i cant pick up. I try relogging in and stuff but it still doesn't let me pick up the items.