I'm a newbee here so go easy on me

A quick overview... My last undertaking of recording was with Sonar 6 which was a short but fruitful adventure and due to life's circumstances (abducted by aliens) I put my recording suitcase in the closet. Jumping ahead to March 2015.... I once again got the recording bug so I splurged for a new computer (Lenova i5-4460 1TB 8 GB etc), Saffire Pro 14 interface, and other goodies. Along with this I upgraded from Sonar 6 to Platinum.. a light year leap to say the least!!! So far while learning Platinum, which I find fascinating, I have really only encountered one large issue of utter frustration which leads me to this post. I have not started any "NEW" recordings but I have taken 3 unfinished songs from Sonar 6 and have totally reworked them in Platinum adding some new vocals, instruments, etc. My only issue is when I export these songs to my Media Player to burn to CD they have additional time at the end. For example one song is 5:04 minutes in length but now the MP3 file in Media Player is showing the same song at 14:07 minutes. This same phenomenon is happening with all three songs. When I burn the CD the songs really do have a long silence (for meditation?) at the ends and/or between. All the songs stop at the end and reset to the beginning properly during playback in Platinum. I have contacted Cakewalk support who suggested highlighting the Time Line Bar along with time markers at the beginning and end but that did not work. I also put the correct times in the Task Bar settings to no avail. I have spent the last 3 weeks laboring with these songs and now feel like I should have stayed with the aliens.

Any other suggestion(s) would be greatly appreciated, Thanks.