I think the problem for Clover is the partition layout of your Windows drive....
Usually the EFI System partition is the first partition on the drive so Clover maybe getting confused with it being the second.
Another user had a similar problem booting Windows with Clover when the EFI partition was not the first partition on the drive - see post by @cool_recep.
Below is the partition layout I use with Windows X64_UEFI installed on the same drive as Mavericks. Clover on this drive can still boot UEFI Windows Server 2012 installed on a separate external USB HD (whose EFI is the first partition).
You should see something like "Boot Microsoft EFI menu from EFI"
A few tips for anyone dual booting Windows/OSX
An annoying quirk for dual booters is that Windows and OSX use different clocks: OSX and Linux use GMT time while Windows uses local time for the clock. To get around this and keep time in synch between the OS's, I set the key RealTimeIsUniversal=1 in the Windows registry - instructions here from Prasys's blog.
You can install Apple's bootcamp HFS drivers in Windows by following the instructions in this guide. They enable you to access your OSX partition in read only mode (so you can copy over important files to the Windows partition as backup for example).
I keep a FAT32 "Shared Data" partition that contains my documents, pictures, music etc that can be accessed by both OSX and Windows.