Please excuse me if this is somehow a duplicate. I couldn't find anything remotely similar.
Every time I put my pets in the resort, I do so for two weeks. I double check to make sure it's two weeks and maximum attention and then I let it go.
The past two times I've gone and done this, the two weeks never happens, it lasts for about two to four days and then it punts my pets back out, eats about 10k sP each time and I have to repeat the process.
Chrome + Windows 7.

Looks like this was reported here. :)
If you don't mind, can you add your report there? Having more information/reports will help!