To set this up, you need to setup the first Authorize.net (v1) processor to handle the first chunk.

When setting up this processor, you may choose to only split dues, but default 100% to this processor.  That's OK, just set the settings according to the default and the Split Level Rules.

When setting up the Split Level Rules, select the split item, then the amount to split.  After adding the first one, you'll see the set of rules assigned to the processor.

If you enter too high of a value, we'll process them in order until the entire amount due is charged.

Now when we process the payment, we'll confirm if there are rules associated with it.  If so, we'll charge accordingly.

When taking payment in the Control Panel and rules apply, we will display the breakout of the charge.