In Deus Ex, everytime I go in to see manderly, he says something like "here is your 1000 op bonus" but then afterwards, under skills I have the exact same number of skill points. Is this a common bug? how do I fix it
Manderly gives you a 1000 bonus in credits.
Verified here: http://www.gamefaqs.com/pc/250533-deus-ex/faqs/10041
Now go up and visit Manderly. His L/PW is on his secretary's desk, and you can read his account or hack it on the secretary machine. Talk to her, and then go into Manderly's office. 250 skill points. He'll give you 1000 credits, plus 250 if you rescued Hermann. And he'll know if you've been in the ladies' restroom!