Charger and Solar controller not meshing well?

The solar was performing a 14.7v charge. The WFCO was in 13.5v mode. When I closed the disconnect switch, shouldnt the charger supply a very small float charge, as the solar continues its 14.7v charge?

Would expect the solar charge amps to reduce some. Didnt expect the solar to run backwards.

My controller is small and cheap. It only has 4 terminals. 2 for the panel and 2 for the battery.