I changed the deadline of a Milestone and all the tasks in the associated task lists did not get pushed. 

I also don't see any way to mass select tasks and change the deadline or start date like you can change owner or mark them closed.

Some of our task lists have 20+ tasks.  We often have a project that will be put on hold for one reason or another.  When it becomes active again we need to update the dates of 6 task lists each with 10-20 tasks or the entire project shows as overdue.

I know this isn't an uncommon issue this is a major feature of TeamworkPM as well as other software.  

Help.