Its a bug in C2 it seems, these two conditions are not normally able to be used together. However it seems that C2s "validation check" only apply if you drag the "every x seconds" to the "On timer event". However no validation is made if you drag The "On timer event" to the "Every x second" event and then it apparently gets bugged and think its an "Is between angle" event
You should post this in the bug section.