Theoreticaly it shouldnt happen, one should not be drawn into RT enc if cmbt mode is set to TB only, but it happens sometimes altho very rarely... Happened to me maybe 3-4 times in 3 years of playing. There could be a glitch in the way game marks the type of enco because I remember clearly entering player enco on purpose (enc window clearly stated combat mode was TB) and when I entered cmbt mode was RT.