Don't mix the orange Dex and conventional green coolant. Either do one or the other. Either way, at this point I would flush the entire cooling system and then refill with distilled water and your choice of coolant. Most here go with the normal green stuff to avoid future issues. Also, if you aren't familiar with the coolant system bleeding proceedure for these cars do a quick search for it on here as they will get air in the system and do strange things if not bleed out.
Do an oil change BEFORE you start the car again, then refill it again and run it for 100 mi. and then change it again. This will ensure you get any coolant out of where it shouldn't be. It sounds like a waste of money, but then again so is killing the motor due to coolant trashing a bearing or 2.
