There is a difference in file sizes compared to my installation, this is what I get.
maxer@M4700:~$ ls -l /usr/bin/indi_simulator_*
-rwxr-xr-x 1 root root 88384 jan 8 07:42 /usr/bin/indi_simulator_ccd
-rwxr-xr-x 1 root root 26944 jan 8 07:42 /usr/bin/indi_simulator_dome
-rwxr-xr-x 1 root root 31040 jan 8 07:42 /usr/bin/indi_simulator_focus
-rwxr-xr-x 1 root root 18752 jan 8 07:42 /usr/bin/indi_simulator_gps
-rwxr-xr-x 1 root root 51520 jan 8 07:42 /usr/bin/indi_simulator_guide
-rwxr-xr-x 1 root root 18752 jan 8 07:42 /usr/bin/indi_simulator_rotator
-rwxr-xr-x 1 root root 35136 jan 8 07:42 /usr/bin/indi_simulator_spectrograph
-rwxr-xr-x 1 root root 18752 jan 8 07:42 /usr/bin/indi_simulator_sqm
-rwxr-xr-x 1 root root 63880 jan 8 07:42 /usr/bin/indi_simulator_telescope
-rwxr-xr-x 1 root root 31040 jan 8 07:42 /usr/bin/indi_simulator_weather
-rwxr-xr-x 1 root root 18752 jan 8 07:42 /usr/bin/indi_simulator_wheel
So my guess is that you have a wrong version of indiserver/drivers installed for some reason ? you should check that you have the right ppa for "INDI Stable Builds".
The "locate libcfitsio.so" is just fine, but did you do a : sudo updatedb before you did the locate command ?