Has anyone else been having trouble withdrawing from the site?

I withdrew 0.0024 BTC a handful of days ago, it's stuck in unconfirmed status because the fee was only 500 satoshis (something like $0.27). Support reimbursed me the amount, to be recouped from me when the transaction eventually confirms or returns. Support said "this is a highly unusual occurrence as perhaps there was a dramatic dip in mining fees at the time of your withdrawal."

Well, I just withdrew 0.002 BTC to a different address this time, and it happened again, I checked the transaction on blockchain.info and the fee again is just under 500 satoshis. I checked the last withdrawal from my account before these recent two (it was months ago, and it was under 0.0002 BTC) and the fee was just under 16,000 satoshis, so there was no issue.

I'm wondering why my recent two withdrawals have such a low fee? It's rather inconvenient