i have this problem last time too its like ppl can see him but some cant but now got the wolflite 8.7 and here are afew solutions:
1) if u use wolflite 8.7 inside got god mode the god mode make u cannot see the ppl that is using god mode ( but u ned to kill him ONCE then u wont be able to see him) so question is did u see him and killed him ONCE then u cannot see him/her??
2) if u not clear wat i say in the 1st 1 then try dont use hack and play with your friends and see if u can see him/her or not XD (its better to take off wolflite and replace back with the backup >> buddy2.dll beecause sometimes u will acidenty started the hack)
(correct me if i am wrong and hope i helped)