Transiting in los angeles

This is the gateway for the US.  We got off pretty quickly and we got taken out of the queue at customs and put in the US citizens line (I think it was because Lexie wouldn't stop tap dancing and they wanted her to get out of there as soon as possible).  We arrived into terminal 4 and we went across to Delta at terminal 5.  We got put on standby for the 0930am flight to Orlando.  They took our bags but forgot to onload us!  So the bags went but we didn't!  Then they listed us on a flight to Atlanta and sent us to terminal 6 for the gate because it was leaving in an hour.  After rushing around like lunatics (Lexie was still tap dancing) when we got there, they were looking for passengers to get off because the flight was so full.  Forget Delta!  We went back to American Airlines in Terminal 4 to try our luck with them.  They put us on the next flight to Dallas Fort Worth.