Are your seats right next to each other? Space between them? Youngest in the middle?

According to the manufactures guidelines for the LATCH system in my car and the type of car seats we have our Britax convertible must be in the middle (where it currently is) and our infant seat needs to be either behind the driver or passengers seat (where it was when we used it with DS). Anyone have any problems with a toddler being seated directly beside an infant? I can't help but envision some poking and fighting going on...

**I wasn't sure where to put this?