Yes, AHCI should have been turned on before you ever did anything besides attaching the first SSD to your system.
I have never done what you have, but I have followed numerous threads here on Tom's which have dealt with this. And to the best of my knowledge, you need to copy everything you want to keep to that big old hard drive.
Once you have everything backed up, I assume that Kingston provided you with some utility program that can secure erase the SSD. If they did, use that, and when it completes, power down (shut down will not be able to complete since you just wiped the SSD, so just press and hold the power button until the computer shuts off). After that, unplug the sata and power cables from the hard drive. This will prevent any accidental formatting of that hard drive.
At this point, if you need to get the motherboard manual out, and look at the page that tells you which SATA ports are which. Then normally are numbered 0 to whatever, but some do start at 1.
At this point, you now has the option of making either SSD your boot drive. Plus whichever one you choose into SATA port 0. Then plug the other one into port 1. Leave the hard drive disconnected until you are done formating both SSD's.
Once that is done, power up and go into the BIOS, and turn ACHI on. At this point look at the drives the BIOS detected, and you should see the DVD and both SSD's. After that, setup the boot order to be DVD drive, then the boot SSD. Do not list the second SSD in the boot order. Save and Exit, and let the computer boot up from the Windows disc.
You want to select the boot SSD, and you want to format the SSD before it installs Windows. Windows will probably offer to do the format since the SSD is no longer formated after the secure erase. Either way, it cannot proceed without formatting. But if you were unable to secure erase the SSD for some reason, make sure you tell Windows to do it.
Assuming now that Windows installs properly, and it should, you will need to re-enter your registration key, and then it should leave you at the desktop.
Now move the mouse pointer up into the upper right cornet and move it straight down. A black side panel should come out, and one of the options will be Search. Select that, and enter Format Drive into the search box. Press enter, and the Disk Management window will appear. From this window, you should see your unformatted SSD below the formatted one. You should be able to right click it, and format it. Once that is done, you can power down and attach your hard drive, and power back up, at which point you should see drives C:, D: and E:.
This would be a good time to go download the latest drivers from your motherboard manufacturer's website, if you do not have a copy of them already. All of those should be installed, and then start Windows Update, which is going to take a long while.
Be careful to NOT overwrite your new Windows install with the old one.
Once that is all done, you can start moving your old software around. Just remember that since you formatted the SSD, the registry was wiped clean as well. And virtually every program around stores things in the registry. So they will need to be re-installed too. But your data for those programs is on the hard drive. So copy the program, data and all off of the hard drive to where you want it, and then reinstall the program. Be sure to tell each program where it needs to install if its not the default place on the boot SSD.
Its a lot of work. But its the only way I have seen to recover from this.