You will have a fair amount of trouble with this panel , better to get an engineer out who knows it well , they can reset all codes for you aswell , that will be the first thing
Realistically get some quotes for new alarm seems not many are able to fix these , and there are very few engineers who know what there doing with them, date I say it? Some adt engineers could probably fix it , old school
Set to prox on entry ?
So look for option in police options maybe that's the problem
Actually I mis read what you said lol it's only the delay zone you have problem with