90 Day Logic Pro X Trial

So It seems everything works fine, However. Whenever I go to Export ( All files into 1 ) the Audio it's exporting does not retain the input given and is sounding unmixed with uneven volume levels, I've been a GarageBand user 10 years + and a Logic Pro X user for 3 years now and this is defiantly an Issue that needs to be addressed, Please I assure you, as a sound recording engineer i've properly tried to export multiple songs and I always have the same outcome and I'm wondering if it's because I'm using the trial version. I recently updated to a 2019 MacAir I've never had this issue before using a non trial versions on my 2013 MacAir but now i'm scared to Purchase the full copy of Logic Pro X. I Don't want to pay 200$ and still not be able to Export my songs properly. Somebody from apple please help, I need answers i'm on day 40 of the trial. Thank you