Is it normal for MEPS to cancel because they are backed up, and then to delay rescheduling?

That is not unusual. Dealing with MEPS is extremely frustrating for us, but I have to remind myself that they have their own mission and procedures designed to save taxpayers money. Sometimes that means they are understaffed and can't process that actions as fast as we need. USAREC got a four day this weekend, so we lost a processing day and the floor may be full when they are trying to project you. Just work with your recruiter and stay motivated.

Has the Recruiter reached out with an update or has your son reached out to the Recruiter asking about any updates?

Ma'am while I understand your frustration hang in there and have faith that all things will happen in time. Just keep working the recruiter.