In Sentinel, the first time that you try to select only one or two departments and the appropriate sites of a large system, and then use the Append to Favorites list option, it will carry
all of the system sites with your intended departments. There's no way around it in Sentinel. However, in ProScan, you can, instead, import only the departments and sites you want, either from the database in Sentinel, or through a web import if you are a Premium Subscriber. You show to be Premium, so you do have that option. (I don't have ARC536, so I'm not sure whether you can both of those in that software, or only a web import.)
Once you append the department(s) that you want, you can then select & delete the sites you do not want. In the main screen of Sentinel, you can select them (they'll be highlighted once selected), as thatoneiowan noted, by holding down the Shift key and selecting the first and last site (if they are consecutive. Then, either hit the delete key to delete, or <right><click> and select "Remove from Favorites list". If some of the sites are not contiguous, then hold down the <Control> key to pick & sites to delete. Again, once you have your items all selected, either use the Delete key, or Right Click and select "Remove from Favorites list". Either way you do this, you'll get a pop-up asking you to confirm you want to remove the ones you selected.
Or, you can choose to edit the Favorites list, and then delete whatever you need to by using the Editor. Note that in the appended system, the sites will be in alphabetical order. On the database page for the
system, the sites are shown in site order. You can click either the
Name column header, or the County column, to sort them on the database page. That's helpful since some of the sites may have names you are not familiar with.
View attachment 85520
Once you've cut down the sites to what you want, be sure and save the changes if you used the Favorites Editor.
Note that after I append a few departments, and cut out the extra sites, I can then go back to the database and select and append one or more additonal departments to the same system, If I'm appending to the same list, and as long as I have not edited the system's name, Sentinel will let me select and append individual departments or sites without dumping all of the sites again.