PTO and Holiday Calendar Auto Updating Assignments

Hi,

I've noticed that whenever a new calendar exception or change is made, whether it is working hours, holiday, or PTO it automatically updates assignments during that time period. 

For instance, if I have a resource with 160 hours of capacity and 120 hours assigned to a task and create a 40 hour PTO exception it will simultaneously reduce capacity to 120 hours and reduce the work assignment to 90 hours.

Is there a way to make it so that Clarizen doesn't rescale hours based on the new capacity?  At a minimum I would like it to compare against free capacity first, but more generally I'd like it to not make any auto-updates and simply flag the resource as over allocated.

Thanks!