Cafe City
If you were turned on to a heading of 190 at GUAVA (where in all probability you would have been tracking 250), then a turn of 60 degrees to the left for about 10 miles, would give you about 10NM extra to run to LIMES, not 25 as you suggest. There are many reasons why inbound aircraft from SIERA are "dropped" in, and as a general rule, you are not privy to them. I think I could say in passing that at times, creating an easier traffic sequence for ATC is one of them. It would take many thousands of words to elucidate all of the various reasons and traffic dispositions that result in the decision being made to "shortcut" traffic from SIERA, that may result in traffic inbound from TD/GUAVA being bent to the South to accomodate.
As you point out in your last post Cafe City, "we (pax) were put on the south the other day", this is quite true. We no longer broadcast on the ATIS that freighters/BAC/GFS will land on the South runway. The ATIS now defines (under normal circumstances) that all arrivals can expect the North. What has mainly changed is that various members within the ATC group can offer/dictate that certain landings may take place on the South runway. Obviously the bulk of these will be freighters/BAC and pax aircraft parking on the South apron.....after all, we not only try and make life easier for you....but we also like to make life easier for ourselves. Bear in mind that each time a decision is made to allow a "South lander" then various bits of internal co-ordination need to take place. This of course is sometimes a waste of our efforts, because we will "offer" the South, and then it will be declined.
Part of the reasoning behind this new philosophy is that aircraft landing in trail on the North/South runway can be more closely spaced than repetitive arrivals on the North runway...a saving to you, and the less onerous taxiing after landing that this entails also, is a saving to you. The disadvantage is, that departures can be delayed, so careful reasoning takes place before random South runway arrivals are allowed.