EMERGENCY!! Confused about agents, about to sign!!

[David Sirmons]

I've been working with a standard Re-Max agent to give me REO listings and make offers. She recently told me the prices of the REO properties on the lists are as close to bottom as they can get. I've been making offers @ 2/3rds of the list prices, but have no way to verify if she has actually been submitting my offers. She does tell me that other offers are accepted over mine however.
Should I sever all ties with her and get a strictly 'buyer's agent' or just stick with her? I have FOUR offers currently written up by her awaiting my signature and I fear that she may simply be trying to nudge me toward higher prices/offers for her own benefit. Please give guidance asap!