I recently aquired Horizon as part of the Iceberg Humble Bundle, and I like it a lot, good work L3o

I play humans, and the Tantik are (surprise!) at war with me. They (supposedly) sent a single invasion transport with two cloaked scouts to invade my planet, while I have three transports (couldn't you have named it "destroyer" or some such?

Imagine my surprise when suddenly the "Invasion" screen pops up, claiming they were able to land their troops before getting destroyed. Is this an intended behaviour? Because IMHO if I destroy all the troop transports within 3 combat turns, an invasion should be prevented. I have put the Autosave of the turn right before the "incident" up on filebin here: http://filebin.ca/1km6PTNp1BKP/Slot_000.zip
I have also made a backup of my Horizon Game folder in my Documents, if you need any logs or other saves (e.g. right after it).
To reproduce:
1) Load the save game provided
2) Press "turn"
3) When the Battle in "Harztav, Sector 6,21" happens, either engage or autoresolve, either check or don't check "destroy colony" - the invasion happens no matter what
For the record, I play vanilla without any modifications to the game.