z3c 5803 Lollipop 5.1.1 rooted -> TWRP Factor Reset -> Now Philz Touch 6 instead of TWRP

I used TWRP to make a backup ( with the default options ) to make a backup to my external SDCard. Then I used TWRP to perform a default factory reset I did not manually touch anything else. I booted my android to check if I got a factory reset but I did not wipe anything else or install anything. If I now boot into recovery I see "Philz Touch 6 Now I am confused, normally at this point I saw the TWRP GUI ? Is TWRP still on my phone Why is Philz Touch there now ? PS: This was the first time I used the key combination to boot into recovery. Before the factory reset I used the app "quick boot" to boot into recovery. But I assume both methods ( app and physical buttons ) have the same results. So my Question is where is TWRP after I performed a TWRP Factory Reset ?