Since you don't need the old OS on E any longer, and Recovery partition won't run without it anyway, I would move the data off of it to wipe DISK0 of old boot code with Diskpart Clean Command,
then repartition it as you desire in Disk Mgmt: Partition or Volume - Create New
This may solve the problem with it interfering, although it could also have to do with how it is installed and the port it is plugged into. Often an SSD needs to be plugged into the SATA 1 port which it most likely is not if it's Disk1. I don't know how easy it woudl be to switch the HD's or if you'd even want to try. So try the easiest solution first to wipe the boot code from Disk0 that may be interfering.
If the SSD performance isn't perfect then you might want to reinstall following the steps you apparently ignored in the tutorial I provided to get a perfect Clean Reinstall - Factory OEM Windows 7