I understand very little about this subject. So here are some questions... the fed issues treasury bonds (am I right?) then some bank buys them, i.e. the bank

I understand very little about this subject. So here are some questions... the fed issues treasury bonds (am I right?) then some bank buys them, i.e. the bank gives the fed money and the fed pays it back with interest until the bond's maturity (because that is what bonds are, right?) then the bank can do whatever it wants with the bonds. As far as I undestand "bond securities", whoever holds the security (bond) recieves the interest from the issuer (this is an assumption, is it correct?) but now, the fed buys the bonds back (?) through the repo (repurchase agreement), which means that whomever sold them will buy them back from the fed in a few days? So the fed will (temporarily) owe itself the interest? what!? needless to say, I am slightly confused..