Understanding the bit depth of mp3

I'm looking for expertise on mp3 audio files, specifically the mp3 format. Although I'm IT and have managed an Icecast streaming server using darkice client for many years, I inherted from a well-qualified sound engineer being the only one who knows Linux. According to Darkice, the bit sample rate is 44100 with a bit depth of 16, correct?

[input]
device          = default #hw:1,0
sampleRate      = 44100     # sample rate in Hz. try 11025, 22050 or 44100
bitsPerSample   = 16        # bits per sample. try 16
channel         = 2         # channels. 1 = mono, 2 = stereo

When I use soxi to show details of a recorded audio from the stream using streamripper, I see this:

wmnfadmin@monitor:~$ soxi /nfs/Soundfiles/AV-Issues/wmnf_000000_000001_satbgs1_153.MP3
soxi WARN mp3-util: MAD lost sync

Input File     : '/nfs/Soundfiles/AV-Issues/wmnf_000000_000001_satbgs1_153.MP3'
Channels       : 2
Sample Rate    : 44100
Precision      : 16-bit
Duration       : 00:53:59.89 = 142879149 samples = 242992 CDDA sectors
File Size      : 38.9M
Bit Rate       : 96.0k
Sample Encoding: MPEG audio (layer I, II or III)

However, if I load this same file in Adobe Audition or Audacity, it shows 32-bit float as the bit depth. Can someone help me to understand why? Our audio playback software is having issues ingesting some of this audio and we're told it is because the bit depth is 32-bit and I'm looking for ways to correct the issue.