Confused about which is what? Jellies, jams, conserves, marmalades and butters are all related. All have fruit and sugar in common, but differences in texture and fruit-form, distinguish one from the other. Here's the spread on fruit jamin':

Jelly
Made from fruit juice, it is clear and tenderly firm. Quiveringly, it holds it's shape when turned out of the jar.

Jam
Made form crushed or ground fruit it almost holds its shape, but is not jelly-firm.

Preserves
These are whole fruits or large pieces of fruit in a thick sirup that sometimes is slightly jellied.

Conserves
These glorified jams are made form a mixture of fruits, usually including citrus. Raisins and nuts also are frequent additions.

Marmalade
This is a tender jelly with small pieces of citrus fruit distributed evenly throughout.

Butters
These are fruit pulps cooled with sugar until thick.