457 Catchup - DBAs Not Rolling Over to CU After Limit Is Met

Hello community!

I am setting up three different DBAs for the 457 Catchups.

4300 - 457 Deferred ($18k limit)

4301 - >50 CU ($6k limit)

4302 - Special CU ($18k limit)

When the 4300 hits its $18k limit, I have it setup so that the 4301 DBA kicks in, but if the 4300 DBA limit is hit during the middle of a payroll and the full 4300 DBA amount is not taken (like if $100 was not taken), I cannot get the 4301 to pull over the "remaining" amount (that $100). When the 4301 kicks in, it only takes the amount on the DBA Instructions.

Is there anyway to get the 4301 DBA to include what's leftover from 4300 that first time it runs?