Replying to Flexing my skis and boots

okay so i just got a pair of k2 fujatives (used only a little bit) and a pair of tecnica agent 80s. so i decided to go flex these out on the carpet. So I started getting my tips up and my tails but I started getting some pain in my heels. Is this a usual occurance with buttering and nosepresses? Since i had the pes the last few years and i didnt butter them at all. Or is it is the new boots not getting fully broken in yet? I have worn the boots around the house just not skied on them. Lastly this might sound like a dumb question but is flexing your skis not that great for them? Or does it not do any harm?