This appears to be a continuation of AMI to originate two separate calls and the probable cause is either a DAHDI misconfiguration or a limitation of the DAHDI peer, for which the answer to that thread apply.
The logs show two successfully originated calls, in both cases. In one case no invalid DTMF is entered on both, and in the other invalid DTMF is entered on the first one, and nothing on the second.
My suspicion is that the underlying problem is the lack of working answer supervision, causing the call to be treated as answered immediately, but, as you screen scraped rather than using the log files, there is no timing information.
With many peers, there is no way of enabling answer supervision, and all you can do is introduce a time delay. The use of analogue lines for automated processes is inadvisable.