TLDR = It was the mod, vanilla game worked fine. This issue should be declared as closed/resolved.

Well, I have now tried the mission several times both with the mod on and off, and can now say with high degree of certainty that the mod is (or is at the very least link to) the cause of this issue. The actual issue, now that I have seen what should happen, is that after the ambush the vehicles should move up to the warehouses but with the mod on they do not. I believe that this is causing the team leader's vehicle to stop at the warehouse as they pass it since that would normally have been the location the vehicle should have been for its next movement. I'll let the mod maker know about the issue.

Thank you for taking the time to help me work through this issue

I'm going to go ahead and retry the mission with the mods enabled to see if it will work, and barring that, I will retry the mission with them disabled to check if they might be triggering the issue.

I am playing the stable version of the game.

I have the mod "bCombat v0.16" which requires the Community Base Addons (CBA) to also be installed.

I had installed the mod early on in the single player campaign, and as of yet it has given me no problems.

(the mod maker has stated that the mod is designed to work in the campaign so long as a few options in the mod's configure file are set to the settings he listed in his post, which I did set them to)

Link to "bCombat v0.16" - http://forums.bistudio.com/showthread.php?171436-OPEN-BETA-SP-bCombat-infantry-AI-Mod

Link to "CBA" - http://dev.withsix.com/projects/cca/files