Empire Error in Your Favor

[XChamp]

Yesterday I cashed $600 out of my Empire account to Neteller so I could hit the bonus on Stars. I stupidly did this before I got the reload bonus on Empire, so I immediately deposited $100 from igm-pay to try and get it anyway. I didn't get the bonus but I did get an email telling me I got one. I promptly forwarded the email to Empire to try and get them to update my bonus account (even though I didn't really deserve it). Within about 10 minutes they put $100 in my bonus account. Yay

I then played for 4 hours or so, cleared it, and then cashed out everthing to Neteller. They let me do this despite the $100 not clearing from checking account yet. They have never done that before. The cashout hit my Neteller account a few hours later. Then I got an email from Empire saying:
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Dear XXXXXXXXX,

empirepoker has just transferred $100 into your EmpirePoker.com account.

Have a good time at the tables.
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And now I have $100 sitting in my account and I don't know why. I already got my Royal Flush Club bonus this month so it can't be that. I already got the $100 for the reload bonus. The cashier history confirms all of this.

I emailed empire about it and all I got back was an email saying that I didn't get the reload bonus because I cashed out $600 yesterday during the bonus period.

I am tempted to just take the money now, but I really don't want to jeopordize that sweet Royal Flush Club $100 every month.

What do you think I should do?