No, there isn't a problem with the Social Security Benefits Worksheet in TurboTax. The Medicare premiums on lines C, D, and E are not added into line 1. Line 1 is just line A plus line F. (Line 1 says "Add amounts from line A and line F," not "line A through line F.") If you don't have an RRB-1099, line 1 is equal to the amount in SSA-1099 box 5. Nothing is added.
