Hi pond182. Welcome to the board. I'm a little fuzzy on part of this. If I cover something you already know, please don't be offended.
First, on the ring in, you said you added them to the "Day in group." Trunk groups have Ring In, Dial Out, and Allowed Answer Settings. The extensions that are allowed to do any of these functions have to be added and there is a Day and Night for each of those. Also, instead of specifying specific extensions in these areas, often times each of these areas will have the number of an "Extension Group." If that is how you are programmed, then the new extensions should be added to the group.
On the other issue, if I'm understanding you correctly, you no longer have a ring in, but the LEDs are lighting when a call comes in. If that is the case, it sounds like you removed the phone that had ring in privileges and the others have Allowed Answer which is why they light.
If you can give us some more details we'll try to point you in the right direction.
