hey guys, i got some problems here and i hope you can help me

Well i think i should start from the beginning:

1) While playing the mission "Söldner" (maybe its called mercenary in the english version, i don't know) i get in the beginning a 2. mhq which i cant board - bug?

2) When i started the mission i did not use the mhq because i wasnt able to use it. I was abtle to buy units, so i thought there are no problems... After some captured citys i got the mission to investitage the little island right below the main one.
After some time the USA marines came back and were under my command and when i was ready to investigate the island i visited it and found lopotev. Well Cooper says, we've found him and some guy says there'll be a chopper to pick us up - but there won't come one.

Also the NAPA and CDF are allied but one target is still to capture one city which is already from an ally
All citys are captured and i found lopotev but there is nothing happening.

Another question is why there is still the task to destroy the cdf HQ even if they are our ally (I killed the Warlord in this mission because i wasnt able to do so in the mission before (shot about 120 times but he didn't die)).

Many questions, and i hope there'll be many answers
Sorry for my bad english

obi