link for the lazy:
seems like some kind of auto play or random play is enabled. I'm not sure if this machine specifically supports that function, perhaps it's just flushing out song selections stored in memory. hard to say. the manual will enlighten you one it shows up.
as for the tracking issue,
you should wash your records really well...get all that dirt out of the groove. playing a dirty record not only can ruin the stylus, but ruin the record. don't use rubbing alcohol, it can ruin the vinyl.
Don't use soaps or solvents as they can leave a residue. (unless you have a layer of oil or grease on them, in which case a mild detergent can be used...just be sure to rinse really well. warm to cool water. never hot.)
also check your stylus (AKA the needle) for foreign materials. a buildup of crud from dirty records can build up behind the needle causing it not to "track" or follow the groove. your stylus may also be broken. in which case, you will need a replacement cartridge.