I just purchased a Britax Roundabout 50 for my 2.5 yr. old on clearance from Target. I went to adjust the straps and it says when rearfacing shoulder straps should be at or just below shoulders, so I moved them to the second slot from the bottom (and moved the crotch strap to the middle one), so that they are just at her shoulders. When I tried to buckle her in it she kept complaining that the shoulder straps were rubbing on her neck and there are faint red lines there where it rubbed. Should I move the straps back down to the lower slot, will this alleviate them from rubbing on her neck/shoulders?