NeroAACEnc doesn't create simple LC mp4

[alexVS]

Hi! I encode wave with NeroAACEnc.exe
I want to receive mono, Low Complexity (LC), VBR

The source is simple wav file:
MediaInfo:
Audio
ID : 0
Format : PCM
Codec ID : 1
Codec ID/Hint : Microsoft
Duration : 2mn 47s
Bit rate : 512 Kbps
Channel(s) : 1 channel
Sampling rate : 32.0 KHz
Resolution : 16 bits

If I encode with -LC I got:
Format profile : LC (That's fine)
Format settings, SBR : No (That's fine)
Format settings, PS : Yes (Parametric stereo ??? I don't want this)
Codec ID : 40
Duration : 2mn 47s
Bit rate mode : Variable
Bit rate : 61.8 Kbps
Maximum bit rate : 70.5 Kbps
Channel(s) : 2 channels (why ???)
Channel positions : Front: L R
Sampling rate : 32.0 KHz
Resolution : 16 bits

If I encode with HE, I receive 1 chanel (Center, mono), SBR, no PS, but that is not what I want (I want LC). Could you help me to understand why NeroAACEnc doesn't create simple LC mp4?

[alexVS]

In sound editor I made stereo with identical channels from the source mono. NeroAACEnc with -LC encoded it fine: 2ch, no SBR, no PS.
But with the same -q 0.5 the avarage bitrate increased from 61 upto 79 Kbps. I thought that encoder is clever enough to detect that both channels are identical. So there is no direct mono encoding? Only with SBR or Parametric Stereo?

[menno]

The file is encoded as mono LC just fine, just reported as stereo PS because the signalling for PS is implicit. Decoders will also decode the file to 2 channels (because it needs to assume that the file does have PS (not my idea, it's in the AAC standard)), but the channels will be identical.