Deductions & credits

Still confused. I enter 1095A premiums. I DO NOT link it to my Sch. C business. So the total does NOT appear in the little box  for SE insurance on C.  But it does appear line 2 (o) on Schedule A medical expense worksheet. The SE ins deduction does appear on the SE Ins worksheet for my Sch C business.  So don't get any deduction. If I overide line 29 (o), I get the schedule A deduction. I can now itemize A deductions.  line 2 (o) has no active line to the source of this data.  I understand why linking it to Schedule C I get the SE tax deduction. But not linking it, it should go to Schedule A.  What am I missing.