I've seen several examples where my snipe do not show the current bid. Sometimes bids have been made recently but often 1 or 2 days ago and the current price is still an older one. Seems that myibidder server is not collecting the info from eBay effectively.

This problem means I don't even get to make a bid sometimes because the current price has been over my snipe for some time before the end of the auction.

Myibidder is not a monitoring tool, it's a sniper.
It does not constantly update the current bid in the real time:
https://www.myibidder.com/login/faq/4/#q13

Please also note that current bid does not affect sniping. You just set your maximum and let it go.
If you feel like increasing your snipe based on the current bid, you have a high risk to be emotionally involved into bidding wars and overpay, that's defeating one of the purposes of sniping.