Retirement tax questions

New update today but same thing with lines 4a and 4b.  Read through another knowledge base article for a professional tax software program and it stated that 4a may be less than 4b and this is how the input flows and it's correct as per IRS instructions.   I still think it looks "off" and that if one amount from a 1099-R is partially taxable than the gross distributions from all of the 1099-Rs should show on line 4a.   JMHO