Ah, that's possibly the default now then. Wouldn't think it's that just make sure Guard Attribute isn't on.
Yes, they filter DIY into another queue but you should get through to someone. Your unlikely to need the lead again so it's up to you if you want to bother.
Option A is the simplest route, depends if it's critical to have the entrance area as instant alarm on full set, or if waiting for the timer to end is fine.
If the Entry timer 2 can be kept short then it's probably not an issue.