Check your frame rates.
If that does not solve the problem we need complete workflow details for your rendering.
Thanks, Rick. Yes, I checked the frame rate. I also compared my settings to some other projects I have that I know worked just fine and the settings are all the same. I'm working with Adobe right now via their chat and he had me empty caches, etc. and one comp then worked correctly and then I checked a second comp in the same project and it still rendered 4 frames short.
After going through things with Adobe Support, it appears to have been some issue with the sequence I had in Premiere Pro. I just opened up a new sequence and copied and pasted the clips and comps I had on the timeline and they all showed their correct duration.
I am having the same problem did you figure it out? My sequence was outputting correctly until the last two renders in which it was about 13 frames off.