claims by the competitors
Stop blaming stuff on "competitors".
If you think that making a ponzi "claim" is done by you competitor, I am so sorry that I have nothing to compete with you. Neither am I losing coins on your site and want to destruct your business, frankly I've got quite some profit from you. What I am doing is just expose this stuff to every investors to your site that your algorithm (at the point you haven't modified). I am not much a free guy that have a lot of time to waste on stuff like this, I have bunches more of summer assignments to clear up.
From the words of other investors now investing, it seems you have identified that new investments are not profit. With the current situation that your investment system have made a loss for you as you "overpaid" profit by determining new investment as profit, and without a clear invest and divest log in your system (anyway coins are not revertable :meh:). You should consider verivifing how many coins had every user have left on the server and how much coins you have in the wallet. Making sure that your future transaction go smooth. By the way I have knew a Chinese guy who have deposited 100BTC into your system, havent tossed into anywhere, just the balance. If he is not contacting you (a smart friend's not-so-smart friend, dont even know who he is), i guess you can make use of those coins temporarily to cover the loss perhaps.
Your site is buggy.
Next time coding new stuff. Not only getting 25 confirmation from the network is important, consider confirming your logic and the final code 25 times before you release.