Reverb send query

I have track with acoustic guitar, set up a send with reverb.   By accident I had the reverb plugin for the send set as 100% DRY (rather than 100% wet).    Even with no reverb from the plugin, if the send is at 0db, I can hear what appears to be a doubling of the guitar sound.   As I understood thing, the reverb is only supposed to send back the wet signal, and not the dry, so I was expecting to hear nothing sent back, until I had some Wet included on the reverb send.    Is it normal what I am hearing?

This thing pops up again and again.
 
I had a similar thing, Waves Trueverb and forgot to turn off direct on the preset I chose - and got this distortion on L2 limiter on master.
 
turning off direct, it went away.
 
Something is not quite what it should be regarding pdc. Trueverb has it, L2 not.
 
Time to make a sample project and really narrow this down, the sooner the better....it can be a showstopper finalizing a project at some point.

I've never heard this with plugins that not supposed to introduce a delay, like with a compressor or exciter. When I blend the signal with the original track there is no phasing. However, with plugins like reverbs and delays, I can hear phasing when the plugin is not set to 100% wet. I wonder if there is something inherent in the type of plugin that is the cause?
 
Regards,
Dan
 

Yes, Sonar can't deal well with delay compensation on sends changing during playback (or apparently similar scenarios where looping confuses it), which results in phasing sometimes.
 
But, addressing this bit in the first post - "the reverb is only supposed to send back the wet signal, and not the dry, so I was expecting to hear nothing sent back" - no. The send outputs everything you push through it. It has no notion of what is 'wet' and what is 'dry' - only your plugins know that. So, if your reverb on a send channel is just outputting 100% of your original signal (because it is set to 100% dry), then you will hear 200% of your original signal, 100% from the original track, and 100% from the send.
 
This means that it is down to you, when you insert something on a send bus, to set the output to 100% 'wet' and 0% 'dry', if you are just trying to blend in an effect. (Some effects are 100% wet by definition - like most EQs or compression - so either you use them as an insert instead, or you are deliberately using them to 'double' the initial sound, usually with some sort of extreme processing on the send acting as some sort of interesting effect.)