Yes. 4a is correct. You had two distributions and both must be reported to the IRS (even if it is the same money). 4a is the gross amount listed in box 1 of each 1099-R.
(I am assuming the 1099-R for the recharacterization has a code N in box 7.)
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
