I'm dealing w/ a similar nap issue for my 16mo DCK. Mom gets her as soon as she makes a peep, so her nap at home is usually less than 30 minutes. She goes to sleep fine, but wakes up after 1 -1 1.5 hours. If I get her, she is loud enough to wake up others. If I don't, I have to listen to her scream for 30 minutes. I keep hoping she'll grow out of it, but she's been her for 3 months and I'm slowly loosing it. She's such a sweet kid otherwise, and her mom's work schedule is amazing, so I really want to hang in there but UGH.