Thanks for your post. First, I have to say that laws regarding foreclosure vary greatly from state to state. Here in California, once a home is sold in foreclosure, it is the property of the new owner or the lender, if the lender is the only bidder. However, in other states,there is something called a "redemption period" wherein the homeowner may reverse the foreclosure with cause.
In Florida, according to legal websites I've reviewed, it appears that there is not a redemption period, so the sellers cannot legally buy the house back unless you are willing to sell it to them. However, it also appears that there is a specific process involved in requiring tenants to vacate the premises, and that is a process that you should review with a qualified attorney or legal specialist in your area. You certainly have the right to the property, but to evict the tenants, you will need to follow specific procedures. Evicting the previous owners and simultaneously preventing them from further damaging the home is one of the inherent problems in buying foreclosure property at auction.
Grace Morioka, SRES
Area Pro Realty
Santa Clara County, CA