Site being buggy

A few issues I've noticed that weren't happening before. Chrome is my browser.

-I can no longer enter purchase date and get the error "Enter valid date or leave blank", regardless of a manual entry or through the calendar with the date properly formatted.
-When I am updating my gallery and check the main page, the items I have just added do not show up until after I log out. The last added items show as new. When looking at the section the new items were added to, the other items show up as updated even though I didn't touch them.
-Items I added on June 7 still show up as new when viewed at the section level.

TBH I have zero to low expectations of any of these issues being resolved but am raising them to see if others are also experiencing the same thing (s). Hopefully the site isn't breaking down.

I definitely have been having the purchased date issue for a month or so now. It drives me nuts because I like keeping record of when I acquired these cels. I've just been adding it into the notes section for now :/

Another thing that has come up - I thought new thumbnails would resize but they are displaying at full size. This affects my Toshio Maeda gallery, which has full sized thumnbails, making them no longer thumbnails. Deleting the thumnbail results in nothing displaying, and using the base image generates the same result.