Your overlapping plans include 4 LLMPs, including two Tier 1s*; that isn't allowed. Also, the time periods for Dumbo and Under the Sea would each be an hour long. So, I guess we are only talking about a hypothetical situation. If you actually had those five start times, I was going to suggest moving one of the middle times (such as Under the Sea at 10:30) to a later time. Under the Sea and Dumbo should be readily available at later times.
I would recommend not scheduling your rides too close together. But if you ever do wind up in a situation where it is 30-60 minutes after the LLMP expiration time, I suggest going to the attraction and trying to tap in. Some people have gotten green lights at the tapstile when that late, although you can't necessarily count on it. I remember an Earscouts video where Rob said he asked a cast member how long the grace period was and he was basically told "it depends." But even if you get a blue light, and it becomes a question of cast member discretion, having delays caused by young kids is often treated as a reasonable excuse.
* - I realize Tiana's could be a VQ instead of an LLMP. But you wouldn't have a definite return period until your boarding group was called. And I believe there is more flexibility for being late to a VQ than for the LLMP of the same ride.
