check it up:
1st: he doesnt recognize your hostmark + channel is +bitch
2nd: your are beeing deopped because you were bad to him and he will dislike you forever now

there could be even more, but these 2 are the most common ones

.
To prevent this from future, i would reommned you giving Q channel master flag. he will then only deop on nickchanges etc. ^-^