i would say its a config or sms string issue not a module issue. If it wasnt working atball then maybe.
I would suggest a factory restore and reprogram
You need a panel that supports groups. The veritas is a very basic panel and cannot work that way. You need something like a dimension or even better a siemens spc
it would depend on the ages of the other components. if over 5 yrs old then yes id replace it all. nice looking keypads are subjective. castle keypads are quite rated visually
you will use one of the programmable outputs programmed as bell for your bell connection. There should be a wiring diagram in the manual for your bells. But personally id of gone for a cqr bell as they are easy to wire up in 2 way.
I would recommend a kband dt in the conservatory, ie 7450 as x band will penetrate the glass more.
All modules are the same its just the cases that are different.
You can wire multiple modules eol but it wont comply (unless its a galaxy)
it would be better to have individual devices on each circuit.
In your environment i probably wouldnt of recommended a scantronic unit but anyway.
I wouldnt recommend a pir in a garage due to drafts, spiders etc. You would need a dualtec. However scantronic dont make a wireless dt. I would suggest you use door contacts instead.
No the ip interface on the honeywell unit is designed for signalling to an arc. You can use a digicom etc to communicate with an arc and that in turn can be emailed to you via extended format