It could be several reasons you're seeing this. Here is the EXIF data for each shot:
1) Exposure Time: 1/250 sec
F-Number: f/10.0
Exposure Program: Normal Program
ISO Speed Rating: 100
Lens Aperture: f/9.9
Exposure Bias: 0 EV
Metering Mode: Pattern
2) Exposure Time: 1/1600 sec
F-Number: f/5.6
Exposure Program: Aperture Priority
ISO Speed Rating: 3200
Lens Aperture: f/5.7
Exposure Bias: 0 EV
Metering Mode: Pattern
Your ISO is set very high for the indoor shot (3200) so it may not be soft as much as noisy. It's hard to tell in these shots for sure after they have been resized for the web. The indoor shot is at 1/1600 sec at 3200 ISO which is a strange setting. Lower the ISO to get a crisper shot overall.
To really know if it's the filters or just your imagination shoot the same scene with the same camera settings both with and without the filter. Then compare those pics.
I think you made my brain explode.
I have no idea what most of those numbers mean.
I'm sure the camera is smarter than I am to start with, and it takes better pictures than anything else I have ever owned. So I may just have to be happy with what I have. My reading retention rate seems to be less tha zero these days, so books aren't a lot of help, but, I usually only take pictures about 5 times a year anyway (almost as often as I go to the range these days).
Thanks for the help everyone.