plane appear on ramp/ not landing??

[Tomcat 101]

Hi! I was intalled Barksdale AFB and C-5 West Coast and i never see that problem before . I create flight plans for 4 C-5 to go to Barksdale. I was on ramp at barksdale waiting to see the C-5 arrival, I wait and I wait and surprise the C-5 not land!! It appear right on the spot on the ramp?? I wait a little more time for the 3 other C-5 ( I have 5 minutes delay between the C-5 ) Same result all the four C-5 appear on the ramp spot , no landing no tower call for landing and of course no taxi on spot. I never saw that, before my flight plan always work fine, tower call approach landing,taxi. somebody have a clues. Thanks in advance!!

[Firebird]

That normally means that there is a timing issue in those flightplans. Quite often if an earlier leg arrives at or before it is due to take off this effect can occur.
When I mean earlier I don't mean the previous leg and can be several before hand.

What I would recommend is getting hold of Don G's AIFP and running a validation against those plans. It might reveal the issue which you can correct.