Overtraining chest?

[AdamGH]

A couple of ppl have been telling me that i've been overtraining my chest. Personally i like it. My chest is getting bigger and strong so i think i'm doing something right. Nonetheless i wanted to get some opinions/suggestion on making my rountine better for strength training. Here's my last chest workout:

155lbsx12, 185lbsx10, 205lbsx10, 225lbsx6, 245lbsx5, 265lbsx1, 270lbsx1

A couple of times i added two more:

185lbsx10, then lastly 135lbsxfailure (around 20)

Any thoughts?

If it works, then go for it. Seems alright. How many other sets are you doing for chest though?